The first one
if u need an explanation comment
So you know that:
2x+y=14+y
and
5x-y=x+13y
Here you have two equations with two unknown variables:
If you isolate x from the second equations you get:
x=(7/2)y
Insert that in the first equations and solve for y:
2*(7/2)y+y=14+y
y=2
Insert that value for y in one of the two equations (i chose the first):
2x+2=14+2
x=7
Therefore x=7
Hope that helped.
Actually you could start with isolating x, and then insert that in one of the two equations.
Answer:
Step-by-step explanation:
Actually, when dividing fractions, you always flip the second fraction and multiply, no matter the size of the numerator or denominator.
Answer:
Step-by-step explanation:
Given
Required
Solve for x = -5
This implies that we substitute -5 for x in
Open all brackets
Absolute value of 36 is 36; Wo, we have:
Answer:
B
7 less than 3 times a number (X) is (3x-7), and then the sum of these two numbers means we have (3x-7)+X, and then we know this equals 109, leaving us with:
(3x-7)+x = 109
