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OpenStudy (anonymous):
using the substitution method how do you solve x+3y=90 y=3x
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OpenStudy (tkhunny):
Write the first equation: x + 3y = 90 Observe the second equation is already solved for 'y' Rewrite the first equation using the substitution defined. x + 3(3x) = 90 This gives a single equation that can be solved for x. Multiply by 3 and obtain the value for y.
OpenStudy (anonymous):
thank u
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