Chapter 5: Systems of Equations and Inequalities
Lesson 2: Solve Systems of Equations Using Substitution
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Practice
Use substitution to solve the system of equations.
1.
y − 3x = 6
y=x
2.
,
2x + 6y = −2
x = − 3y −1
y = x + 10
5x + 3y = 14
5.
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x = 4y + 3
5x + y = −23
8.
5x − 3y = 4
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2x + y = 5
9.
,
3x + y = 4
4x = 4
2x + y = 40
,
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11.
2x + y = 5
3x − 2y = 4
12.
,
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y = 5x + 1
2y = 4x
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,
y = 2x − 5
x = 3y
,
y − 15.5 = x
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,
6.
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,
13.
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,
3x = y − 9
10.
,
1.2x − 4.8y = 1.6
---
x−y=4
2x − 3y = 9
,
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14.
x − 2y = 7
x = 2y + 7
,
=y
x + 13 = y
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,
7.
−4x − 7
,
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4.
3.
15.
x + 5y = 7
x + 5y = 10
,
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16.
x + 4y = 8
3x + 6y = 9
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---
2x − 3y = −9
17.
13 − 6y = −7x
18.
8x + y = 16
,
,
,
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1
2
3
11x − 5y = 15
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4
5
6