Step-by-step explanation:
We have to get one positive 7y so,
4x-7y=5
9x-7y=-15
multiply anyone of the equation by -1. I choose the first one so,
4x+7y=-5
9x-7y=-15
we can now cancel the y's so the equation will be left with
-4x=-5
9x=-15
add the equations
5x=-20
divide by 5 n u get
x=-4
now plug in the x value in any one of the
equations
I choose the first one so,
4(-4)-7y=5
-16-7y=5
add 16 to both sides
-7y=21
divide by -7
y=-3.
finally check.
Answer: 1+1 is equal to 2, because adding a singular object to a specified amount of something to the number 1, it will increase by just that. Therefore, if the quantity of something is one, adding the number one to its value will be the number 2.
Answer: the answer is B
Step-by-step explanation:
Answer:
Yeah.it is right
Step-by-step explanation:
Answer:
$12
Step-by-step explanation:
Monday: $50
Tuesday: 50+25=$75
Wednesday: 75-20=$55
Thursday: $55-17=$38
Change from Monday to end of Thursday: $50-$38
=$12
