### 8.2 Substituting for a Variable

Problem #

Problem Statement

Problems Similar To

1.

Solve using substitution method.

$$y=6x\textrm{ },\textrm{ }9x+10y=10$$

2.

Solve using substitution method.

$$10x+y=8\textrm{ },\textrm{ }6x-9y=10$$

3.

Solve using substitution method.

$$x=4-8y\textrm{ },\textrm{ }2x-7y=7$$

4.

Solve using substitution method.

$$8x+2y=0\textrm{ },\textrm{ }8x+y=-2$$

5.

Solve using substitution method.

$$-x+6y=-9\textrm{ },\textrm{ }8x+y=2$$

6.

Solve using substitution method.

$$6x-y=-7\textrm{ },\textrm{ }8x-9y=-4$$

7.

Solve using substitution method.

$$-x+10y=-4\textrm{ },\textrm{ }7x-2y=8$$

8.

Solve using substitution method.

$$2x+2y=-4\textrm{ },\textrm{ }4x-y=-5$$

9.

Solve using substitution method.

$$4x+4y=20\textrm{ },\textrm{ }(-6)x+9y=-6$$

10.

Solve using substitution method.

$$7x+5y=3\textrm{ },\textrm{ }-15x+18y=-30$$

11.

Solve using substitution method.

$$40x-4y=-36\textrm{ },\textrm{ }8x-6y=-8$$

12.

Solve using substitution method.

$$y=x-2\textrm{ },\textrm{ }y=10x+9$$

13.

Solve using substitution method.

$$y=2x+10\textrm{ },\textrm{ }y=2x-2$$

14.

Solve using substitution method.

$$5x-y=6\textrm{ },\textrm{ }x+y=-6$$

15.

Solve using substitution method.

$$10x+y=4\textrm{ },\textrm{ }y=x-5$$

16.

Solve using substitution method.

$$4x+6y=0\textrm{ },\textrm{ }x+5y=-4$$

17.

Solve using substitution method.

$$9x-9y=7\textrm{ },\textrm{ }x+2y=-7$$

18.

Solve using substitution method.

$$(-2)x+y=0\textrm{ },\textrm{ }3x+4y=-4$$

19.

Solve using substitution method.

$$\frac{1}{3} \times x+\frac{1}{3} \times y=4\textrm{ },\textrm{ }\frac{1}{6} \times x+y=9$$