Решите пожалуйста 4х+2х-7=5; х+3=3х-7 ; 3-х=1+х; 7х+2=3х-10; 2(х-5)=9; 12+3(х-1)=0; -(х+8)=3
Исходное не пишу 6x=5+7 6x=12 x=2 x-3x=-7-3 -2x=-10 x=5 -x-x=1-3 -2x=-2 x=1 7x-3x=-10-2 4x=-12 x=-3 2x-10=8 2x=8+10 2x=18 x=18 : 2 x=9 12+3x-3=0 3x=-9 x=-3 -x-8=3 -x=3+8 -x=11 |·(-1) x=-11
4x + 2x - 7 = 5 6x = 12 x = 2 x+3 = 3x - 7 2x = 10 x = 5 3-x = 1+x 2x = 2 x = 1 7x + 2 = 3x - 10 4x = -8 x = 2 2 (x-5)= 9 2x - 10 = 9 2x = 19 x = 9,5 12+3 (x-1)=0 15x = 15 x = 1 -(x+8) = 3 x = -11