Solve the system of equations by substitution:

1. \( y = 3x \)
2. \( 2x + y = 15 \)

so you subtitute y=3x into 2x+y=15 so 2x+(3x)=15 add like terms 5x=15 divide both sides by 5 x=3
subtitute x=3 into first equation (y=3x) y=3(3) y=9

Answered by apologiabiology | 2024-06-10

it's simple jus plug in 3x into Y and u will have 2x+3x=15 5x=15 the answer(x=3)

Answered by ag7521977 | 2024-06-10

The solution to the system of equations y = 3 x and 2 x + y = 15 is ( x , y ) = ( 3 , 9 ) . We found this by substituting the value of y from the first equation into the second equation and solving for x first. Then, we substituted x back to find y .
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Answered by apologiabiology | 2024-10-13