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13\times 4+3+15\times 4+2=117
Multiply both sides of the equation by 4.
52+3+15\times 4+2=117
Multiply 13 and 4 to get 52.
55+15\times 4+2=117
Add 52 and 3 to get 55.
55+60+2=117
Multiply 15 and 4 to get 60.
115+2=117
Add 55 and 60 to get 115.
117=117
Add 115 and 2 to get 117.
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Compare 117 and 117.
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