4a+3-a=-7+2+a

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1 Answer

4a + 3 - a = -7 + 2 + a
3a + 3 = -5 + a {combined like terms on each side}
2a + 3 = -5 {subtracted a from both sides}
2a = -8 {subtracted 3 from both sides}
a = - 4 {divided both sides by 2}
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