Question 204180
3(5+6b) +8(2a-b)
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Distribution  is  the  first  step
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{3*(5) +3(6b)} + {8(2a) -8(b)}
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{15 +18b} +{16a -8b}
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now  combine  like  terms
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16a +10b +15
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Have  a  great  day