3 years ago

Can sumbody help meh wit dis plz and ty .I’ll give ya 14 points

Mathematics

2 answers:

andre [41]3 years ago

6 0

Answer:

1. is 5

2. is -4

3. is -24

Step-by-step explanation:

i dont understand why you didnt just use a calculator but here.

aliina [53]3 years ago

4 0

Answer:

Step-by-step explanation:

1) x + 7 = 12

Add the additive inverse of 7 = -7 to both sides

x + 7 - 7 = 12 - 7

x + 0 = 5

x = 5

2) 7a = -28

Divide both sides by 7

7a/7 = -28/7

a = -4

$3)\frac{y}{8}= -3\\\\$

Multiply both sides by 8

$\frac{y}8}*8=-3*8\\\\y=-24$

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