5t + 2 = 3t - 2t + 5 Collect like terms 5t - 3t + 2t = 5 - 2 4t = 3 t = ¾ Check: 5 x 3/4 = 3¾ + 2 = 5¾; 3x¾- 2x¾ + 5 = 5¾ QED
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You don't for t, as gathering your coefficient variables together = 0 5t - 5 = 5t + 7 now, subtracting 5t from either side to get the variables on one side of the equation renders this. - 5 does not = 7
If t=1, then 5t = 5 and 5t + 5 = 10
5t + 25 = 525 divide by 5 to both sides t + 5 = 105 subtract 5 to both sides t = 100
12
7 +5t