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jeyben [28]
3 years ago
15

The Sum of a number y and -3 is -8

Mathematics
2 answers:
Wittaler [7]3 years ago
7 0

Step-by-step explanation:

The sum of a twice number, x, and twice another number, y, is -78.

ryzh [129]3 years ago
5 0

Answer:

-5

Step-by-step explanation:

Count the difference of -3 and -8 and thats -5

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Find a and b to make the following matrices equal.
podryga [215]
We need the following to be true
a+2b = -a
a+4 = 2a - 3b

Let's look at the first equation.
a + 2b = -a
Subtract both sides by a
2b = -2a
b = -a

Substitute b= -a into the second equation
a+4 = 2a + 3a
a + 4 = 5a
4a = 4
a = 1

Just take the negative of that and you get the value of b.
b = -1

Your solution is a=1 and b = -1.

Have an awesome day! :)
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Answer:

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