3(2-4)-2(5+3x)=20 второе уравнение. 4(6-7х)+4(6х-5)=7
3(2-4)-2(5+3х)=20 6-12-10-6х=20 -6х=20-6+12+10 -6х=36 х=36/(-6) х=-6 ответ -6 4(6-7х)+4(6х-5)=7 24-28х+24х-20=7 -28х+24х=7-24+20 -4х=3 х=3/(-4) х=-0,75 ответ -0,75
1) 3(2-4) - 2(5+3x) = 20 -36х - 6х =0 х = -6 2) 4(6-7х)+4(6х-5)=7 -3 - 4х = 0 х = -0,75