Question

verifique se -7 é raiz de equação: 2(x+4)-x/5=x-1

Answer 1

2(x+4)-x/5=x-1
2x+8-x/5=x-1
2X-X+8-(X/5)+1=0
X+8-(X/5)+1=0
5X+40-X+5=0
4X+45=0
X=-45/4

Answer 2

2(x+4) - x/5= X-1
2x+8 - x/5= x - 1
2x-x - x/5= - 1-8
x - x/5 = -9

Mmc= 5

(5x - x)/5 = 5.(-9)/5
4x/5= -45/5
4x=-45
X= - 45/4