0(2a−3b)(2a+3b)+(2b+5a)+6a+8(a+2)(−2)(x+2)=0
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0(2a−3b)(2a+3b)+(2b+5a)+6a+8(a+2)(−2)(x+2)=0
2b+5a+6a+8a+16×-2(x+2)=0
10a+19b+16×(-2x-4)=0
10a+19b-32x-63=-16
10a+19b-32x=47
a+b-x=47/10+19-32
a+b-x=47/-3
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