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Molodets [167]
3 years ago
5

-7a + 1 = 15 solve and check

Mathematics
2 answers:
EastWind [94]3 years ago
8 0

Answer:

-7

Step-by-step explanation:

-7a + 1 = 15

1. Subtract 1 on both sides

-7a + 1 - 1 = 15  - 1

-7a = 14

2. Divide by -7 into both sides

-7a/-7= 14/-7

a = -7

Check:

Substitute the x with -7

-7(-7) + 1 = 15

* 2 negatives become a positive

14 + 1 = 15

15 = 15 CORRECT

Hope this helped!

Andrews [41]3 years ago
6 0
-7a + 1 =15
-1 -1

-7a =14

(Divide each side by -7)

a= -2

-7(-2) +1 =15
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