2 answers:
Answer: a) x = 5 b) x = 12
Step-by-step explanation: For each one you just do the inverse to get it on the other side of the equal sign. For example x + 3 = 8 would be like this :
1. x + 3 = 8
2. x + 3 - 3 = 8 -3
( + 3 - 3 cancels out)
3. x = 5
a. x + 3 = 8
x = 8 - 3
x = 5
b. x - 5 = 7
x = 7 + 5
x = 12
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