Question

7(a+8)=90-3a ПОМОГИТЕ СРОЧНО ​

Answer 1

7а+56=90-3a

7a+3a=90-56

10a=34

a=34÷10

a=3,4

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Answer 2

Ответ:

7(a + 8) = 90 - 3a

7a + 56 = 90 - 3a

7a + 3a + 56 = 90 - 3a + 3a

10a + 56 = 90

10a + 56 - 56 = 90 - 56

10a = 34

(10a) / 10 = 34 / 10

a = 3.4