Resolva as operações:
A)7 (x-4)=2x-3
B)3 (x-2)=4(3-x)
C)3 (3x-1)=2 (3x+2)
D)7 (x-2)=5 (x+3)
E)3 (2x-1)=-2 (x+3)
F)5x-3 (x+2)=15
G)2x+3x+9=8 (6-x)
PRECISO DAS CONTAS MONTADAS URGENTE!!!
Respostas
Explicação passo-a-passo:
a) 7(x - 4) = 2x - 3
7x - 28 = 2x - 3
7x - 2x = -3 + 28
5x = 25
x = 25 ÷ 5
x = 5
b) 3(x - 2) = 4(3 - x)
3x - 6 = 12 - 4x
3x + 4x = 12 + 6
7x = 18
x = 18/7
c) 3(3x - 1) = 2(3x + 2)
9x - 3 = 6x + 4
9x - 6x = 4 + 3
3x = 7
x = 7/3
d) 7(x - 2) = 5(x + 3)
7x - 14 = 5x + 15
7x - 5x = 15 + 14
2x = 29
x = 29/2
e) 3(2x - 1) = -2(x + 3)
6x - 3 = -2x - 6
6x + 2x = -6 + 3
8x = -3
x = -3/8
f) 5x - 3(x + 2) = 15
5x - 3x - 6 = 15
2x = 15 + 6
2x = 21
x = 21/2
g) 2x + 3x + 9 = 8(6 - x)
5x + 9 = 48 - 8x
5x + 8x = 48 - 9
13x = 39
x = 39 ÷ 3
x = 3
Explicação passo-a-passo:
7 (x-4)=2x-3
7x-28=2x-3
7x-2x=-3+28
5x=25
X=25/5
X=5
3 (x-2)=4(3-x)
3x-6=12-4x
3x+4x=12+6
7x=18
X=18/7
3 (3x-1)=2 (3x+2)
9x-3=6x+4
9x-6x=4+3
3x=7
X=7/3
7 (x-2)=5 (x+3)
7x-14=5x+15
7x-5x=15+14
2x=29
X=29/2
3 (2x-1)=-2 (x+3)
6x-3=-2x-6
6x+2x=-6+3
8x=-3
X=-3/8
5x-3 (x+2)=15
5x-3x-6=15
2x-6=15
2x=15+6
2x=21
X=21/2
2x+3x+9=8 (6-x)
5x+9=48-8x
5x+8x=48-9
13x=39
X=39/13