Make the coefficient of y the same in both equations:
To do this, multiply equation one by 2, and equation two by 5 (this will make the coefficient 10 in both).
14x + 10y = 38
-35x - 10y = -80
Eliminate the y variable by adding the equations from each other
(14x + 10y = 38)
+ (-35x - 10y = -80)
= -21x + 0y = -42
We now have -21x = -42. The y variable has been eliminated.
Solve for x
-21x = -42
Divide both sides by -21 to get x on its own.
x = 2
Substitute x into the equation to find y.
7*2+5y=19
14+5y=19
Subtract 14 from both sides.
5y=19-14
5y=5
Divide by 5 on both sides to get y on its own.
y=5/5
y=1
The answer is (2,1)
Answer:
£120
Step-by-step explanation:
If the phone has been discounted by 35%, then it is now 65% of the original price (as 100 - 35 = 65).
Divide the discounted price by 65 to find the amount per 1%, then multiply by 100 to get the original price.
(78 ÷ 65) x 100 = £120
Answer:
The answer would be B. X . 3/2
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
Hope this helps good luck! :)
-2x
6 - 4 = 2
BOTH NUMBERS HAVE VARIABLE OF X SO THE X WILL GO ON THE 2 ALSO
6x - 4x = 2x
f(x) -g(x) = -3x-5 -(4x-2)
distribute
-3x-5 -4x+2
combine like terms
-7x-3
Answer:
-7x-3
