Respuesta :

chizhien777

Answer:

a. 1

b. -5

c. -9

d. -2

e. 11

Step-by-step explanation:

a. -7 = 3a-10

-7+10 = 3a

3 = 3a

a = 1

b. 2a+13 = 3

2a = 3-13

2a = -10

a = -10/2

a = -5

c. -5a+14 = 59

-5a = 59-14

-5a = 45

-a = 9

a = -9

d. -23 = 4a-15

-23+15 = 4a

-8 = 4a

-2 = a

a = -2

e. -90 = 9-9a

-90-9 = -9a

-99 = -9a

-99/-9 = a

11 = a

a = 11

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