Algebra

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#15112

Simplify 5(2x + 3) – 7(x – 2)

= 10x + 15 – 7x + 14

= 3x + 29

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#18962

Simplify 2(x – 1) – 3(x – 3)	we must be especially careful when expanding with a negative sign
= 2x – 1 – 3x + 9	2(x – 1) = 2 × × + 2 × -1 = 2x – 2
-3(x – 3) = -3 × × + -3 × -3 = -3x + 9 = –x + 8	Only add and subtract like terms, the x’s with the x’s and the numbers with the numbers, paying extra special attention to the negative signs 2x – 3x = –x -1 + 9 = 8

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