Respuesta :

Danboghiu66

Answer:

x=4

Step-by-step explanation:

4x + 7y= 51

We replace y by 5 and determine x.

4x+7×5=51

4x+35=51

4x=51-35

4x=16

x=4

igoroleshko156

Answer:

x = 4

Step-by-step explanation:

Step 1:  Substitute 5 for y and solve

4x + 7(5) = 51

4x + 35 = 51

Step 2:  Subtract 35 from both sides

4x + 35 - 35 = 51 - 35

4x = 16

Step 3:  Divide both sides by 4

4x / 4 = 16 / 4

x = 4

Answer:  x = 4