Question

4(x+5) + 3(x+5) = 21 equação
resposta eh -2

Answer 1

4(x+5)+3(x+5)=21
4x+20+3x+15=21
7x=21-20-15
x= -14/7
x= -2

Answer 2

4(x+5) + 3(x+5) = 21
4x+20+3x+15=21
4x+3x=21-15-20
  7x= 21-35
  7x=-14
    x=-$\frac{14}{7} =-2$