Answer:
5x=45
Step-by-step explanation:
Solve: 4+x=12
~ Subtract 4
~ x = 8
~ (not nine)
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Solve: 2x=20
- Divide by 2 (isolate x)
- x = 10
- (not nine)
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Solve: x+7=26
~ Subtract 7
~ x = 19
~ (not nine)
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Solve: 5x=45
- Divide by 5 (isolate x)
- x = 9
- (Nine! Our answer)
