Respuesta :

3x - 10 = 21 + 3x
3x - 3x = 21 + 10
0 = 31 (incorrect)
this equation has no solutions because ur 2 lines are parallel

breaking this down...u have 2 lines
y = 3x - 10 and y = 3x + 21

u can go to desmos (an online graphing calculator) to graph
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