Question

a)4z= -28
b)3x+2=x-6
c)3c-9=0
8x-3=5​

Answer 1

Resposta:

a)-7

b)-4

c)3

d)1

Explicação passo-a-passo:

a) 4z=-28

z=-28/4

z=-7

b)3x+2=x-6

3x-x=-6-2

2x=-8

x=-8/2

x=-4

c)3c-9=0

3c=9

c=9/3

c=3

d)8x-3=5

8x=5+3

x=8/8

x=1

Answer 2

Resposta: a) z = -7   b) x = -4    c) c = 3     d) x = 1

Explicação passo-a-passo:

a) 4z = -28

a) $z = \frac{x-28}{4}$

a) z = -7

]b) 3x + 2 = x - 6

b) 3x - x = -6 - 2

b) 2x = -8

b) $x = \frac{-8}{2}$

b) x = -4

c) 3c - 9 = 0

c) 3c = 0 + 9

c) 3c = 9

c) $c = \frac{9}{3}$

c) c = 3

d) 8x - 3 = 5

d) 8x = 5 + 3

d) 8x = 8

d) $x = \frac{8}{8}$

d) x = 1