Use the distributive property to multiply the 7 by each term inside the parentheses.
7(a - 3 + 4b) =
= 7 * a - 7 * 3 + 7 * 4b
= 7a - 21 + 28b
Answer: 7a - 21 + 28b
7(a−3+4b)
distribute
7a-7*3+7*4b
7a-21+28b
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