5x - y = 5
5x - 3y = 15
from the first equation:
5x = 5 + y , substitute it in the second equation:
5 + y - 3y = 15
5 -2y = 15
-2y = 15 - 5
-2y = 10
y = -5
Now,solve for x :
5x = 5 +y
5x = 5 -5 = zero
x = zero
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If: y = x+6 and y = 2x Then: x+6 = 2x And: 6 = 2x-x => 6 = x So: x = 6 and y = 12
George saves nickels and dimes for tolls. If he has 8 coins worth $2.60,how many are nickels and how many are dimes? Answer this question by using system of equation.
Use the substitution method to solve the system of equations. Enter your answer as an ordered pair.y = 2x + 5 x = 1
By elimination and substitution