0
Anonymous
13 + 4 = 17
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Gather like terms: 3t - t = 13 - 4 ie 2t = 9 so t =4½ Check: 3t = 13½ + 4 = 17½, 4½ +13 = 17½ QED
91
9=4a+13 9-13=4a -4=4a -4/4=a -1=a a=-1
1.75 or 13/4
13/10