Question

A) -3x-1=15-5x

B) 2t-6=-24-7t

C) -8u-7=50-5u

D) 5a-7-a=z+9

E) 2z+9=z+9
com as contas pfvr

Answer 1

Resposta:

A) x = 8

B) t = -2

C) u = -19

D) a = 4

E) z = 0

Explicação passo a passo:

A)

-3x - 1 = 15 - 5x

-3x + 5x = 15 + 1

2x = 16

x = 16 ÷ 2

x = 8

B)

2t - 6 = -24 - 7t

2t + 7t = -24 + 6

9t = -18

t = -18 ÷ 9

t = -2

C)

-8u - 7 = 50 - 5u

-8u + 5u = 50 + 7

-3u = 57

u = 57 ÷ (-3)

u = -19

D)

5a - 7 - a = 9

5a - a = 9 + 7

4a = 16

a = 16 ÷ 4

a = 4

E)

2z + 9 = z + 9

2z - z = 9 - 9

z = 0