Решить уравнения. 1.) 7x+3=30-2x 2.) 3(x-2)=x+2 3.) - вопрос №787370217330223223521440227 от Yasik228 09.11.2021 05:32

Question

Алгебра: Решить уравнения. 1.) 7x+3=30-2x 2.) 3(x-2)=x+2 3.) 5-2*(x-1)=4-x 4.) 0.2x+2.7=1.4-1.1x 5.) 0.2(7-2y)=2.3-0.3(y-6)

Yasik228 · Answer

1)7x+3=30-2x7x+2x=30-39x=27x=32.) 3(x-2)=x+23x-6=x+23x-x=2+62x=8x=43.) 5-2*(x-1)=4-x5-2x+2=4-x-2x+x=4-5-2-x=-3x=34.) 0.2x+2.7=1.4-1.1x0.2x-1.1x=-1.4-2.7-0.9x=-1.3x=1.45.) 0.2(7-2y)=2.3-0.3(y-6)1.4-0.4y=2.3-0.3y+1.8-0.4y+0.3y=2.3+1.8-1.4-0.1y=2.7y=-27...