3 years ago

What is 12x-8=10x+4.

Mathematics

2 answers:

docker41 [41]3 years ago

6 0

X=6

combine like terms and then solve like a proportion

solniwko [45]3 years ago

5 0

Answer: X=6

Step-by-step explanation:

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Volgvan

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Step-by-step explanation:

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4 years ago

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Given equations A and B as 2/5x+y=12 and 5/2y-x=6 respectively which expression will eliminate the variable X a) 5/2A+2/5B b)5/2

frutty [35]

Answer:

C) $A+\frac{2}{5}B$

Step-by-step explanation:

Given Equations:

A) $\frac{2}{5}x+y=12$

B) $\frac{5}{2}y-x=6$

In order to eliminate $x$ we need to multiply $\frac{2}{5}$ to equation B and add it to A.

Multiplying $\frac{2}{5}$ to B.

⇒ $\frac{2}{5}\times (\frac{5}{2}y-x)=\frac{2}{5}\times 6$

⇒ $(\frac{2}{5}\times\frac{5}{2}y)-(\frac{2}{5}x)=\frac{12}{5}$

⇒ $y-\frac{2}{5}x=\frac{12}{5}$

Adding it equation A.

$\frac{2}{5}x+y=12$

+ $-\frac{2}{5}x+y=\frac{12}{5}$

We get $2y=\frac{72}{5}$

Thus $x$ is eliminated.

So, the expression used to eliminate $x$ is:

$A+\frac{2}{5}B$

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3 years ago

Solve this question for me

ELEN [110]

Answer:

the value of x is 1

Step-by-step explanation:

cross multiply them

2x+10=12x

then take 2x to right hand side

10=12x-2x

then

10=10x

divide 10 on both sides

10/10=10x/10

then it is

1=x

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