Question

Resolva as equações,sendo u=q a)6x+3=21
B)3(x+2)-(2x-5)=3
C)13×-21=17x-30+8
D)x+3/4 -3x-1/5 = -5

Answer 1

A) 6X+3=21
6X=21-3
X=18/6
X=3

B) 3(X+2)-(2X-5)=3
3X+6-2X-5=3
3X-2X=3-6+5
X=8

C) 13X-21=17X-30+8
13X-21=17X-38
13X-17X=-38+21
-4X=-17
X=-17/-4
X=-4,25