X + 2y = 3 ----------- (1)
x - y = 6 ------------(2)
Equation (2) - (1) :
-3y = 3 // ║x - x = 0 ║;║ - y - 2y = -3y║ ; ║6 - 3 = 3 ║
y = -1 // ║ ÷ (-3) on both sides ║
Substitute y = -1 into equation (2) :
x - y = 6 // ║ Equation 2║
x - ( -1 ) = 6 // ║ Sub y = -1 into the equation║
x + 2 = 6 // ║ open the bracket ( - ) ( -) = + ║
x = 4 // ║ Take away 2 from both sides║
Answer: x = 4, y = -1
Answer:
-4p^2-6p+1
Step-by-step explanation:
Answer:
44, 55 and 66.
Step-by-step explanation:
I think you mean the sum of the SECOND and 55. It makes no sense otherwise, if the numbers are integers.
The 3 numbers can be written as 4x, 5x and 6x . So we have the equation:
4x + 6x = 5x + 55
5x = 55
x = 11
So the numbers are 44, 55 and 66.
