find equation of 7 (2x+3)+8 (5x+1)=13 (3x+5)+4 (x+2)
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7(2x+3) +8(5x+1) =13(3x+5) +4
14x+21+40x+8=39x+65+4
54x+29=39x+69
54x-39x=15x= 69-29=40 then divide 15 by 40
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