А)2(4 - 9 d) - (2d+3)=-8(4 - d) + 3(1+2d)
8-18 d -2d-3=-32+8d+3+6d
-18d-2d-8d-6d=-32+3-8+3
-34d=-34
d=-34:(-34)
d=1
б)5(2-3b)-4(6+2b)=28 - (b-2)
10-15b-24-8b=28-b+2
-15b-8b+b=28+2-10+24
-22b=44
b=44:(-2)
b=-2
в)-2(3x+4)+(6+8)=4(5x-2)-(5x+8)
-6х-8+14=20х-8-5х-8
-6х-20х+5х=-16+8-14
-21х=-22
х=-22:(-21)
х=1,05
г)8(4 - 3y)-(7-2y)=-(6+3y)=8(y - 2)
32-24у-7+2у=-6-3у=8у-16
-24у+2у+3у-8у=-16+6-32+7
-27у=-35
у=-35:(-27)
у=1,3