2a
2x+3 = 5x -12
3+12 = 5x-2x
15= 3x
15/3 = 3x/3
5= x
2b
2(5) + 3= 13
5(5) -12 = 13
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2a
2x+3 = 5x -12
3+12 = 5x-2x
15= 3x
15/3 = 3x/3
5= x
2b
2(5) + 3= 13
5(5) -12 = 13