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(3x+5)-(-2x-4)=3x+5+2x+4=5x+9
7*(2x+4x-1)=14x+28x-7=42x-7
(3x+1)-2(x-7)-10=
3x+1-2x+14-10=x+5
2+5=7
(3X+5)-(-2X-4)=3x+5-2x+4=x+9
7(2x+4x-1)=14x+28x-7=42x-7
(3x+1)-2(x-7)-10=3x+1-2x+14 -10=x+5
x=2
x+5=2+5=7