Q. y=31x+5y=2xConsider the given system of equations. If (x,y) is the solution to the system, then what is the value of y+x ?
Write System of Equations: Write down the system of equations.We have the following system of equations:y=31x+5y=2xWe need to find the values of x and y that satisfy both equations simultaneously.
Set Equations Equal: Set the two equations equal to each other to solve for x.Since both expressions are equal to y, we can set them equal to each other:31x+5=2x
Subtract to Isolate x: Subtract 31x from both sides to start isolating x.5=2x−31x
Combine Like Terms: Combine like terms on the right side.To combine the terms, we need a common denominator. The common denominator for 2 and 31 is 3, so we convert 2x to 36x:5=36x−31x5=35x
Multiply by Reciprocal: Multiply both sides by the reciprocal of 35 to solve for x.x=5⋅53x=3
Substitute x Value: Substitute x = 3 into one of the original equations to solve for y.We can use the second equation y=2x for simplicity:y=2⋅3y=6
Add x and y Values: Add the values of x and y to find y + x.y+x=6+3y+x=9
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