1. 5 × (-8z) - 2 × (6z + 20) 2. (-10) × d - (7 + 7d) × 2 uproscic...proszę :D

1.5*(-8z)-2*(6z+20)=-40z-12z-40=-52z-40 2.(-10)*d-(7+7d)*2=-10d-14=14d=4d-14

1. 5 * (-8z) - 2 * (6z + 20) = = -40z - 12z - 40 = = -52z - 40 = = -4(13z + 10) 2. (-10) * d - (7 + 7d) * 2 = = -10d - 14 -14d = = -24d - 14 = = -2(6d + 7)

5x(-8z)-2x(6z+20)=(5x-2x)-8z-6z)+20=3x-2z+20 drugiego nie wiem