Multi-step equations1) 30m -4n + 4n = 2( m +4)2) . -20 ( k-3 ) + 40 k = 20 - 2k3) - 0.5x + 2.5 = 1.5x - 10showyour work and each step

1) m=2/7

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

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

Step-by-step 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

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

x^3-4x^2+3x-2/x^2+1

step-by-step explanation:

factor the numerator and denominator and cancel the common factors