Question

Multi-step equations

1) 30m -4n + 4n = 2( m +4)

2) . -20 ( k-3 ) + 40 K = 20 - 2k

3) - 0.5x + 2.5 = 1.5x - 10

show
Your work and each step

​

Answer 1

1) m=2/7

2) k = -20/11 or -1 9/11

3) x=25/4 (x=6.25)

Explanation:

1) 30m-4n+4n = 2m+8

The -4 n and 4n cancel out.

30m=2m+8

28m=8

m=2/7

2) -20k+60+40k = 20-2k

20k+60=20-2k

22k+60=20

22k=-40

k=-20/11

3) (I multiplied each side by 10)

-5x+25=15x-100

-20x+25=-100

-20x=-125

x=25/4