Simplify 20-30[4 (z+1) - 6 (z-2) ]

Step-by-step explanation:

Apply distributive property

20-30 (4z+4*1-6 (z-2)

multiply 4 by 1

20-30 (4z+4-6 (z-2))

apply distributive property

20-30 (4z+4-6z+12)

multiply - 6 by - 2

20-30 (4z+4-6z+12)

subtract 6z from 4z

20-30 (-2z+4+12)

add 4 and 12

20-30 (-2z+16)

apply distributive property

20-30 (-2z) - 30*16

multiply - 2 by - 30

20+60z-30*16

myltiply 30 by 16

20+60z-480

subtract 480 from 20

60z-460