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coldgirl [10]
3 years ago
13

How do I solve a+18=7a ?

Mathematics
2 answers:
Andre45 [30]3 years ago
7 0
a+18=7a

18=7a-a

18=6a ⇒ a= \frac{18}{6}

\boxed {a=3}
Slav-nsk [51]3 years ago
6 0
a+18=7a \ \ \ |\hbox{subtract 7a from both sides} \\
-6a+18=0 \ \ \ |\hbox{subtract 18 from both sides} \\
-6a=-18 \ \ \ |\hbox{divide both sides by (-6)} \\
a=3
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