Question

calcule as equações do 1° grau abaixo: A) 3x+7=2x+17 B) 7x+18+2x=99 C) 7x=-2x+10 D) x+3x=-2x+36

Answer 1

A: 3x+7=2x+17
x+10=0
x=10
B;
9x=81
x=81÷9 =9
C; 9x=10
x=1,111...
D; 6x=36
x=36÷6=6

Answer 2

a) 3x-2x=17-7
x=10

b)7x+2x=99-18
9x=81
x=81/9
x=9

c)7x+2x=10
9x=10
x=10/9

d)x+3x+2x=36
6x=36
x=36/6
x=6

espero ajudar ♥