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3 years ago

An equation is shown below:

Mathematics

2 answers:

likoan [24]3 years ago

4 0

-2(4x-1)=5+7
(4x-1)=12/-2
4x=-6+1
x=-5/4

Kisachek [45]3 years ago

4 0

Answer:

Distribute -2 into (4x-1) to get rid of the parenthesis.

Step-by-step explanation:

The first thing you should to in solving for 'x' is to get rid of the parentheses by distributing.

$-2(4x-1)-7=5\\\\-8x-2-7=5$

Of course, you would also combine like terms to completely simplify the equation to solve for x.

$-8x-9=5$

Hope this helps.

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CaHeK987 [17]

Answer:

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Step-by-step explanation:

Given:

Let 'x' be the number of questions worth 5 points.

Let 'y' be the number of questions worth 2 points

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So the Total Number of Problems is equal to sum of the number of questions worth 5 points and the number of questions worth 2 points.

Framing in equation form we get;

$x+y=29$ .

Also Given:

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Now Total points in test is equal to sum of the number of questions worth 5 points multiplied by and the number of questions worth 2 points multiplied by 2.

Framing in equation form we get;

$5x+2y=100$

Hence The System of Equations are $\left \{ {{x+y=29} \atop {5x+2y=100}} \right.$ .

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