Persamaan Linier 2 Variabel

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199 Junior High School
Persamaan Linier 2 Variabel
Math Bilingual
Grade 8
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idea
Solving System Equation
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Metode Subsitusi Eliminasi
( Substitution and Elimination )
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Example - 1 Solve for x and y 3x 2y 7 and 2x
y 14.
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First Multiply the bottom equation by 2, to find
the letter of x, Then, 3x 2y 7 x 1
? 3x 2y 7 2x y 14 x 2 ? 4x
2y 28
7x 35
x 5 Substitution x
5 in one of the original equations to solve for
y 3x 2y 7 3(5) - 2y 7 ? -2y 7 -
15 y
4 Answer x 5 and y 4.
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(No Transcript)
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4y 8 48 4y 48 - 8 4y 40 y 10
x 10 8 x 18
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Good Work