Question

Simplify 3z + 4z +4 -2 -5z when Z=8

Answer 1

18

Explanation:

When z=8

Substitute 8 wherever u see z

3(8)+4(8)+4-2-5(8)

24+32+4-2-40

18

Answer 2

18

Explanation:

3z + 4z +4 -2 -5z

Combine like terms

3z + 4z -5z +4-2

2z+2

Let z=8

2*8 +2

16+2

18