4(2z-3)+2(7z+1)+4=3(5z-1)+4
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or,8z-12+14z+2+4 = 15z-3+4
or,8z+14z-15z = 4-3+12-2-4
or, 7z = 7
or, z = 7/7
or, z = 1
or,8z+14z-15z = 4-3+12-2-4
or, 7z = 7
or, z = 7/7
or, z = 1
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