Y=-X+35 You change one or both equations Into y mxb form
Scenario
Finding the value of "x
Students are selling grapefruits and nuts for a
fundraiser. The grapefruits cost $2 each and a
2x8y130
bag of nuts cost $8 each. They sold 35 items Find x:
and made $130. How many grapefruits did
and bags of nuts did they sell?
2x + 8(x+35) - 130
x-number of grapefruits
y number of bags of nuts
System:
Finding the value of 'yº
x + y = 35 -->>Y
-X
2x + 8y = 130 --> KEEP this equation
• just substitute the y expression from
the 1st equation into this second eq.
• then solve for the value of x
• then find the value of y using x value
-X+35
y-35-x
Solution