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4x=3y+23 4y+3x=-19 solve by substitution. No files pls
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5 votes
4x=3y+23
4y+3x=-19
solve by substitution. No files pls

User Yanire
by
4.7k points

1 Answer

0 votes

Answer:

x = ⁷/₅

y = ⁻²⁹/₅

Explanation:

4x = 3y + 23 (×3)

12x = 9y + 69

4y + 3x = -19

3x = -4y - 19 (×4)

12x = -16y - 76

∴ 9y + 69 = -16y - 76

25y = -145

y = ⁻²⁹/₅

12x = 9(⁻²⁹/₅) + 69

12x = 69 - ²⁶¹/₅

12x = ⁸⁴/₅

x = ⁷/₅

User DaveGreen
by
4.9k points
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