Question

Solving Linear Systems by Elimination Solve each of the following linear systems by elimination, and check the solution a) 0.1a -0.4b = 1.9

0.4a +0.5b = -0.8
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Answer 1

a = 3 b = -4

Explanation:

4 (0.1a -0.4b) = (1.9) 0.4a - 1.6b = 7.6

0.4a - 1.6b = 7.6

- 0.4a +0.5b = -0.8

-2.1b = 8.4

b = -4

0.4a + 0.5(-4) = -0.8

0.4a - 2 = -0.8

0.4a = 1.2

a = 3

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