Question

solve the system of liner equations.
-9x+6y=-30
-12x+9y=-30

Answer 1

1. -9x +6y =- 30 2. -12x + 9y =-30 Now multiply Equation 2 by a -2/3 getting:
8x -6y = 20 Now add in order to eliminate y
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-x = -10 so x = 10 Now substitute value found for x in equation 1. getting:
-9(10) + 6y =-30
-90 + 6y = -30
6y = 60
y = 10 How about that both x and y = 10