Explicación paso a paso:
n°2
2x +3x+4x=-20-8=-10
9x= -28= -10
9x= -10 +28
9x=18
x = 18÷9
x = 2
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Verified answer
Explicación paso a paso:
n°2
2x +3x+4x=-20-8=-10
9x= -28= -10
9x= -10 +28
9x=18
x = 18÷9
x = 2