LINEAR

Linear System of Equations

Linear System of Equations

Available Data

Price Cell phone A4 = $ 35.00 (X numbers)

Price Smartphone Z20 = $ 50.00 (Y numbers)

Total sales in Volume = 51

Total Sales in Amount = $ 2,200

Linear Equation

X + Y = 51……… Equation (1)

35X + 50Y = 2220 ………. Equation (2)

Solution (Linear Equation)

Multiply equation # 1 by -50

-50 (X+Y=51)

-50X +-50Y = -2550

Multiply equation # 2 by 1

1(35X + 50Y = 2220)

35X + 50Y = 2220

Add the two equations

-50X -50Y = -2550

35X + 50Y = 2220

-15X = -330………. Equation (3)

/ Equation (3) by -15

15/ (-15X = -330)

X = 22

Put Value of X into ...