Solving Equations

Solving

100

3c - 7 = 5

C = 4

200

3x - 2 = -26

x =-8

300

2b - 5 = 7

B = 6

400

2u - (-9) = 15

U = 3

500

-2b + (-8) = -4

B = -2

Substitution

100

y = -2

4x - 3y = 18

(3,-2)

200

2x - 3y = -1

y = x - 1

(4, 3)

300

y = 5x - 7

-3x - 2y = -12

(2,3)

400

-7x - 2y = -13

x - 2y = 11

(3, -4)

500

-4x + y = 6

-5x - y = 21

(-3, -6)

Graphing

100

y - 3x = 0

2x + y = 5

(1, 3)

200

-x + 2y = -6

x + 2y = 2

(4, -1)

300

-x + 3y = 6

2x + 3y = -3

(-3, 1)

400

2x + y = 7

x - 2y = 6

(4, -1)

500

5y + x = 5

5y - 3x = 25

(-5, 2)

elimination

100

-x - 2y = -13

6x - 5y = -75

(-5, 9)

200

3x - 5y = -9

5x + 2y =16

(2,3)

300

3x + 8y = 67

5x + 3y = 60

(9,5)

400

4x + 7y = 14

-2x + 3y = 32

(-7,6)

500

-11x + 12y = 60

-22x + 24y = 90

No solution