two times a number added to another number is 20. three times the first number minus the other number is 20. find the numbers
1 answer:
Answer:
y=7
Step-by-step explanation:
We have two numbers,
x
,
y
. We know two things about them:
2
x
+
y
=
25
3
x
−
y
=
20
Let's add these two equations together which will cancel the
y
:
5
x
+
0
y
=
45
x
=
45
5
=
9
We can now substitute in the
x
value into one of the original equations (I'll do both) to get to
y
:
2
x
+
y
=
25
2
(
9
)
+
y
=
25
18
+
y
=
25
y
=
7
3
x
−
y
=
20
3
(
9
)
−
y
=
20
27
−
y
=
20
You might be interested in
Answer:
x = 125
Step-by-step explanation:
Given
= 25
Multiply both sides by 5 to clear the fraction
x = 5 × 25 = 125
x = 125
Answer:
The answer is c: N + 13 = 20
Step-by-step explanation:
It's D. scientific notation is in the form of n x 10^m, with n any number between 1 to 10.
Step-by-step explanation:
your answer is 84,000
Step by step, we have:
1 • （-1）= -1
Then -1 • 1 = -1 and -1 • （-1）= 1 =》 1 - 1 = 0
The answers is 0
