3 years ago

Need help 2x+10 2x find x

Mathematics

2 answers:

Yuri [45]3 years ago

3 0

Answer:5

Step-by-step explanation:

anyanavicka [17]3 years ago

3 0

19 or 20 is the right answer i think

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2 years ago

Is 1/3, 7/21 proportion

aliina [53]

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2 years ago

Elimination method<br> 4x-2y=48<br> 2x+6y=-18

yulyashka [42]

$4x-2y=48\\ \\ 2x+6y=-18$

First we'll multiply the second equation by -2

$-2\cdot (2x+6y)=-2\cdot -18\\ \\ -4x-12y=36$

Now let's add the new equation and the first one.

$(4x-2y)+(-4x-12y)=48+36\\ \\ 4x-4x-2y-12y=48+36\\ \\ -14y=84\\ \\ y=\frac { 84 }{ -14 } \\ \\ y=-6$

We found y's value. We'll plug it in one of the equations to find x's value.

$y=-6\\ \\ 4x-2y=48\\ \\ 4x-2\cdot -6=48\\ \\ 4x+12=48\\ \\ 4x=48-12\\ \\ 4x=36\\ \\ x=\frac { 36 }{ 4 } \\ \\ x=9$

Solution ;

(9, -6)

4 0

3 years ago

Read 2 more answers

Answer and shown work for 5x + y = 10 -x - y = -2

konstantin123 [22]

Solve first equation for y:
5x+y=10
y=10-5x. Plug this equation into second equation

-x-(10-5x)=-2
-x-10+5x=-2
4x=8
x=2 (plug x into first equation)

5(2)+y=10
y=0

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3 years ago

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How do I solve this problem? 0.3v = 1.35

kkurt [141]

Divide each side of the equation by 0.3 .

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3 years ago

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