Question

1) resolva as equações de 1 grau abaixo:
b) 2x + 5 + x + 7= 18
c) 3 (x+3) -5= 22
d) 3 (x+2) -1 =2 (x+3) -7
e) 3(x+1) +2 (2x-3) = 5 (x-1) +8
f) 2 (x-1) +3 (x+1) = 4 (x+2)

Obrigada gnt (:​

Answer 1

1) 2x+5+x+7=18
3x+12=18
3x=18-12
3x=6
X=6/3
X=2

2) 3(x-3)-5=22
3x-9-5=22
3x-14=22
3x=22+14
3x=36
X=36/3
X=12

3) 3(x+2)+2-1=2(x-3)-7
3x+6+2-1=2x-6-7
3x+7=2x-13
3x-2x=-13-7
X=-20

4) 3(x+1) +2(2x-3)=5(x-1)+8
3x+3+4x-6=5x-5+8
7x-3=5x+3
7x-5x=3+3
2x=6
X=6/2
X=3

5) 2(x-1)+3(x+1)=4(x+2)
2x-1+3x+3=4x+8
5x+1=4x+8
5x-4x=8-1
X=7

Espero ter ajudado ;)