1-5(2x-5)-3(2-3x)=4x Срочно
1-5(2x-5)-3(2-3х)=4х 1 - 5*2х - 5*(-5) - 3*2 - 3*(-3х)=4х 1- 10х + 25- 6 + 9х =4х 1+25-6-10х+9х=4х 20-х=4х 20=4х+х 20=5х х=20/5 х=4 Проверка 1-5(2*4-5)-3(2-3*4)=1-5(8-5)-3(2-12)=1-5*3-3*(-10)=1-15+30=16 4*4=16 16=16