SOLUTION: Hi i need major help on how to solve an equation using the substitution method the equation is as follows {3x + y = 21,
10x +5y =65
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10x +5y =65
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Question 121515This question is from textbook algebra 1
: Hi i need major help on how to solve an equation using the substitution method the equation is as follows {3x + y = 21,
10x +5y =65 This question is from textbook algebra 1
You can put this solution on YOUR website! 3x + y = 21,
10x +5y =65
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Solve the 1st equation for "y": y = -3x+21
Substitute into the 2nd equation after dividing thru by 5
2x+y = 13
2x+(-3x+21)=13
-x=-8
x = 8
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Substitute into y = -3x+21 to solve for "y":
y = -3*8+21
y = -24+21
y = -3
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Cheers,
Stan H.
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