15=X/3+2.(x+2)/3=(3-x)/2.(x-3)/4-(1+3x)/8.7-(X+5)/2=(2-X)/5-3x.

15=X/3+2.(x+2)/3=(3-x)/2.(x-3)/4-(1+3x)/8.7-(X+5)/2=(2-X)/5-3x.

15=X/3+2x/3=15-2=13x=13÷1/3x=39(x+2)/3=(3-x)/2 양쪽 곱 하기 62x+2=9-3x2x+3x=9-25x=7x=7/5(x-3)/4-(1+3x)/8 방정식 7-(X+5)/2=(2-X)/5-3x 양쪽 곱 하기 1070-5x-25=4-2x-30x30x+2x+2x+2x=4+25-7027x=41x=41/27