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3x+4y=90 X+y=25 Substitution method

3x+4y=90 X+y=25 Substitution method
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2 votes
3x+4y=90
X+y=25
Substitution method

User Yuantonito
by
8.5k points

1 Answer

3 votes
Step by step explanation:
X + y=25
-y. -y
X=25-y

3x +4y= 90
3(25-y) =90
75-3y=90
-75. -75
-3y =15
/-3. /-3

Y=-5
X=25-(-5)
X= 25+5
X=30
User Mohamad Zein
by
7.7k points
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