If you start with a number, add 5, then multiply by 7, the result is 133. what was the original number

Question

24-07-2017
Mathematics

contestada

If you start with a number, add 5, then multiply by 7, the result is 133. what was the original number

Respuesta :

Otras preguntas

Ron brought cupcakes to school to share with his classmates. By the end of the day 5/8 of the cupcakes were gone. What fractions of the cupcakes did Ron have le

Peter Johnson had $120,000 taxable income.The letters F.I.C.A. stand for the Federal Insurance Contributions Act. What amount is subject to the "continuing" Med

Two moles of helium gas initially at 438 K and 0.44 atm are compressed isothermally to 1.61 atm. Find the final volume of the gas. Assume that helium behaves as

Amtrak charges lower fares to students than to its other passengers. This pricing strategy increases Amtrak's profits. From this information, we can conclude th

A machine produces parts on an assembly line for an automotive manufacturer. If a part is defective, it must be scrapped. Every hour, the manager takes a random

Ann screamed in terror while watching the classic horror film, "A Nightmare on Elm Street." It seems likely that _________________ was more active in her brain

In 1954, the state governor of Mississippi publicly rejected the court-ordered desegregation of the University of Mississippi on TV, announcing that state unive

Air at 7 deg Celcius enters a turbojet engine at a rate of 16 kg/s and at a velocity of 300 m/s (relative to engine). Air is heated in the combustion chamber an

Which concept reflects the increasing numbers of species present in an area that includes a wide variety of habitats, vegetation types, and small-scale environm

Angela recently purchased a new Android smartphone. While purchasing the phone, Angela was told that she would need to set up a new email account for the phone.

JonHenderson55 JonHenderson55 · Answer 1 · 2017-07-24T07:18:27+02:00

The original number was: " 14 " .

____________________________________
a + 5 = b ;

b * 7 = 133 .
______________________________________________
What is: "a" ?
______________________________________________
133 / 7 = 19 = b ;

a + 5 = b = 19 ;

a + 5 = 19 ;

Subtract "5" from each side of the equation;
to isolate "a" on one side of the equation; and to solve for "a" ;
_______________________________________________
    a + 5 − 5 = 19 − 5 ;

to get:
________________________________________________
             a = 14 .
________________________________________________
Let us check our answer:

Start with "14" ;

Add "5" :   "14 + 5 = 19 " .
______________________
then multiply by "7" : "19 * 7"
__________________________
and the result is: 133 ?
__________________________
   19 * 7 = ? 133 ? Yes!
__________________________