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21+4x=45-2x 17+8x-2x=43+5x 3(x+1) =x+137
6x=24 x=26 3x+3=x+137
x=4 x=44.6
4) 5x+15+14+2x=4x+16+37
7x+29=4x+53
x=o.125
xD