rawrxdface rawrxdface

20-03-2019
Mathematics

contestada

which of these shows the result of using the first equation to substitute for y in the second equation then combing like terms
y=3x
2x+3y=55

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crazyphycocat crazyphycocat

20-03-2019

[tex]2x + 3y = 55[/tex]

[tex]2x + 3(3x) = 55[/tex]

[tex]2x + 9x = 55[/tex]

[tex]11x = 55[/tex]

[tex] \frac{11x}{11} = \frac{55}{11} [/tex]

x=5

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