Question

(a)10x-19=21
(b)11x+17=10x+13
(c)2y+9=10-y
(d)5+4a=a-3​

Answer 1

Explicação passo-a-passo:

A)10×=21+19

10×=39

×=39/10

×=3,9

B)11×-10×=13-17

×=-4

C)2y+y=10-9

3y=1

y=1/3

D)4a-a=-3-4

3a=-7

a=-7/3