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How to use substitution for 4x+3y=13 and x+y=4
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How to use substitution for 4x+3y=13 and x+y=4

User OFRBG
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A) 4x + 3y = 13
B) x + y = 4
B) x = 4 -y Then we substitute this into Equation A

A) 4 (4-y) + 3y = 13
A) 16 -4y +3y = 13
A) -y = -3
y = 3
x = 1

User Adamyonk
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