# algebra

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2(a-4)+15=13

• algebra -

2(a-4)=-2
a-4=-1
a=3

• algebra -

2(a-4)+15=13

2a - 8 + 15 = 13

2a + 7 = 13

2a + 7 - 7 = 13 - 7

2a = 6

a = 6/2

a = 3

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