3x-2=4x-7
3x-4x=-7+2
-x=-5
(-1)x=(-1)-5
x=5
3(5)-2=4(5)-7
15-2=20-7
13=13 ✓
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Operación:
3x-2=4x-7
3x-4x=-7+2
-x=-5
(-1)x=(-1)-5
x=5
Comprobación:
3(5)-2=4(5)-7
15-2=20-7
13=13 ✓