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Juliette [100K]
4 years ago
12

Solve the system by the elimination method. 2x + y - 4 = 0 , 2x - y - 4 = 0

Mathematics
1 answer:
Flauer [41]4 years ago
7 0
2x + y - 4 = 0.....2x + y = 4
2x - y - 4 = 0.....2x - y = 4

2x + y = 4
2x - y = 4
--------------add
4x = 8
x = 8/4
x = 2

2x + y = 4
2(2) + y = 4
4 + y = 4
y = 4 - 4
y = 0

solution is (2,0)
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-9x+3y=-6,-9x+2y=-10
ikadub [295]
Subject : Linear Equations

→ Use Elimination:
-9x + 3y = -6
-9x + 2y = -10
__________ ---
0 + y = 4
y = 4

→ Use substitution:
-9x + 3y = -6
-9x + 3(4) = -6
-9x + 12 = -6
-9x = -6 - 12
-9x = -18
x = -18/-9
x = 2

So the value of x = 2 and y = 4

I hope this helps...
8 0
3 years ago
Need help on 16 please!!!!!!!
vladimir2022 [97]
16,000 because you divide 40,000 by 20 and you get 2000 so you multiple by 8 the number of students that are out less then 5 days a year
5 0
3 years ago
Read 2 more answers
Think you can balance this scale?
IrinaVladis [17]
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3 0
3 years ago
Chad complained to his friend that he had five equations to solve for homework. Are all of the homework problems equations? Just
rodikova [14]

Answer:

no , 1 , 3 and 4 are expressions as they don't have an equal sign .

3 0
3 years ago
Evaluate:<br> -19 - (-10) + (20) - (30) - (-15)
Kaylis [27]

Answer:

-4

Step-by-step explanation:

-19 - (-10) + (20) - (30) - (-15)

A negative negative is a positive

-19 +10 + (20) - (30) +15

-19+10 = -9

-9+ (20) - (30) +15

-9+20 = 11

11-30+15

-19+15

-4

4 0
4 years ago
Read 2 more answers
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