Systems of Equations- Substitution

Solve for y

100

4y= -12

y= -3

200

y - x = -6

y= x - 6

300

y + 2x = 19

y= -2x +19

400

4x - y = 30

y= 4x - 30

Don't forget to divide by -1

500

6x + 3y = 57

y= -2x + 19

Substitute & Solve

100

2x + 2y = -2

y= -3

Solve for x

x= 2

200

2y + x = 0 

y= x - 6

Solve for x

x=4

300

-2(y) + 10x = 46

y= (-2x + 19)

Solve for x

x= 6

400

2x + 4y = 24

y= 4x - 30

Solve for x

x= 8

500

3x + 6y = 33

y= -2x + 19

Solve for x

x= 9

Find y (Substitute x, then solve for y)

100

y - x = -6

x= 4 

y= -2

200

2x + 2y = -2

x= 2

y= -3

300

-2y + 10x = 46

x= 6

y= 7

400

2x + 4y = 24

x= 2

y= 5

500

3x + 6y = 33

x= 9

y= 1

Two Step Inequalities

100

Solve:   5 ≤ v - 4 - 7

v ≥ 16 (or 16 ≤ v)

200

-5 < 3m - 10 - 2m

m > 5 (or 5 < m)

300

Solve: -3(2n + 1) > 9

n < -2

400

Solve: 5m - 3 ≥ -18

m ≤ -3

500

Solve: 2/3 - 5n/3 ≤ -8/3 

n ≥ 2

One Step Inequalities

100

Solve: m + 5 > -3

m > -8

200

Solve: t + 3/8 ≤ -1/8

t ≤ -1/2

300

Solve: -7b > 42

b < -6

400

Solve: b/3 ≥ -2

b ≥ -6

500

Solve: -3n/5 ≥ -9

n ≤ 15