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Solnce55 [7]
2 years ago
5

Solve two-step equations. -5/2 a + 5 = 25

Mathematics
1 answer:
Goryan [66]2 years ago
6 0

Answer:

a = -8

Step-by-step explanation:

-5/2 a + 5 = 25

Subtract 5 from each side

-5/2 a + 5-5 = 25-5

-5/2 a = 20

Multiply each side by -2/5

-2/5 *-5/2 a = 20*-2/5

a = -8

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-9x-6y=15,9x-10y=145
vazorg [7]

-9x-6y=15

9x-10y=145

Find y first by eliminating the x.

Add the two equations together.

-9x+9x-6y+-10y=15+145

-6y+-10y=15+145

-6y-10y=160

-16y=160

divide both sides by -16 to get +y

-16y/-16=160/-16

y=-10

Use the substitution method to find x

-9x-6y=15

-9x-6(-10)=15

Do the bracket first

-9x+60=15

Move +60 to the other side. Sign changes from +60 to -60.

-9x+60-60=15-60

-9x=-45

Divide both sides by -9

-9x/-9=-45/-9

x=5

Answer:

( 5,-10)

3 0
3 years ago
Anyone wanna help me with this‍‍
Angelina_Jolie [31]

Question 1 Answer: both of them equal 20

Step-by-step explanation: when you add 9+3 it equals 12 then you add 8 and that makes 20. 9+8 also equals 17 then you add 3 which equals 20

8 0
3 years ago
PLS SOMEONE HELP PLSSS
Sav [38]

Answer:

x=17

Step-by-step explanation:

ok so since lines PR and RQ are congruent (we know because of the lines on them), that means angles P and Q are also equal.

now we can set up the equation to find x like this:

29+29+(8x-14)=180 (180 because the three angles of a triangle always equal 180)

x=17

8 0
2 years ago
The Foster family bought 4 crates of eggs last week . Each crate had 18 eggs . Since then , they have eaten 28 of the eggs . How
mr Goodwill [35]
There are 44 eggs left.
Work:
4x18=72
72-28=44
4 0
3 years ago
Read 2 more answers
What’s the answer
Dmitriy789 [7]
The y intercept is 3
4 0
2 years ago
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