Add : 2a + 4b -3, -3a + 2b + 9, -3b - 5a -12 ???
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hope it helps .........
Step-by-step explanation:
(2a+4b-3) +(3a+2b+9) +(-3b-5a-12)
2a+4b-3+3a+2b+9-3b-5a-12
2a+3a-5a +4b+2b-3b -3+9-12
=0+3b-6
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