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Mathematics
Emery Robinson
7 April, 11:29
How do you solve 12h-7=7h+18 as a 2-step equation
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Cassandra Macdonald
7 April, 12:10
0
Step one:
12h-7=7h+18
12h-7h-7+7=7h-7h+18+7 Additive inverse
5h=25
Step two:
5h=25
5/5h=25/5 Multiplicative inverse
h=5
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Declan Hurst
7 April, 12:43
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12h-7=7h+18
-7h - 7h
5h-7=18
+7 + 7
5h=25
5h/5 = 25/5
h=5
1. Subtract the 7h from both sides to cancel out the 7h (7h-7 and 12h-7)
equation becomes 5h-7=18
2. Add the 7 on the left side of the equation to both sides to cancel out the - 7 (-7+7 and 18+7)
equation becomes 5h=25
3. Divide by 5 to cancel out the 5h (5h/5 and 25/5)
equation becomes h=5 solving for h and giving you your final answer
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