Question

VALENDO 54 PONTOS - EQUAÇÃO MATÉMATICA
1) - x + 40 - 30 = - 16
2) - x + 3 = - x
3) - 2 x + 80 - 86 = - 12
4) - 4 (x + 3) = - 2 x + 10
5) x + 50 - 36 = + 5 x 

Answer 1

1)x=26

2)-2x=-3 x=2/3

3)-2x=-6 X= 6/2  X=3

4) -4x-12=-2x+10   -2x=22  x=22/(-2)  X= -11

5) -4x =-14  x= -14/(-4)  X=3,5

Answer 2

1) -x+4-30=-16
-x=-16-4+30
-x=10
x=10

2)-x+3=-x
-x+x=-3
-3

3)-2x+80-86=-12
-2x=-12-80+86
-2x=-6
x=-6/2
x=-3

4)-4(x+3)=-2x+10
-4x-12=-2x+10
-4x+2x=10+12
-2x=22
x=22/2
x=11

5)x+50-36=5x
x-5x=-50+36
-4x=-14
x=-14/4
x=-3,5