Answer:
x=10
Step-by-step explanation:
3x-20=10
add 20 to both sides
3x=30
divide 3 both sides
end with x=10
Answer:
x=10
Step-by-step explanation:
it's a equilateral triangle So its every sides are equal
So the equation is
3x-20=10
=>3x=10+30
=>3x=30
=>x=30/3
therefore
x=10
