3(3x-5)-2(1+6x)+4(2x+3) 8(3+2t)-7(3t-4)+5(1-4t) 9(3y-2)-6(4-y)-8(3y+5) 6(2-x)-4(3x+2)+7(2x-3)

Умножение на скобку
1)3(3х-5)-2 (1+6)+4 (2х+3)= 3*3х-3*5-2*1-2*6+4*2х+4*3=9х-15-2-12+8х+12=17х-17
2)8 (3+2t)-7(3t-4)+5 (1-4t)= 8*3+8*2t-7*3t+7*4+5*1-5*4t=24+16t-21t+28+5-20t=56-40t
3)9(3y-2)-6 (4-y)-8 (3y+5)=9*3y-9*(-2)-6*4+6*y-8*3y+8*5=27y-18-24y+6y-24y-40=-15y-58
4)6 (2-x)-4(3x+2)+7 (2x-3)=6*2-6*x-4*3x-4*2+7*2x-7*3=12-6x-12x-8+14x-21=-17-4x