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3 years ago

Given 8x + 2 = 3 - x; x =

Mathematics

2 answers:

Schach [20]3 years ago

6 0

Answer:

x = 1/9

Step-by-step explanation:

We are given the equation:

8x + 2 = 3 - x

In order to solve for the variable x, we need to isolate it; in other words, we need to combine all the x terms and move everything else to the other side.

First, add x to both sides:

8x + x + 2 = 3

9x + 2 = 3

Now subtract 2 from both sides:

9x = 3 - 2 = 1

Divide both sides by 9:

x = 1/9

The answer is thus 1/9.

~ an aesthetics lover

schepotkina [342]3 years ago

3 0

Answer:

x = 1/9

Step-by-step explanation:

8x + 2 = 3 - x

Add x to both sides.

9x + 2 = 3

Subtract 2 from both sides.

9x = 1

Divide both sides by 9.

x = 1/9

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Solve: 2x+1-14x=-71 This is for 7th grade mathematics. Please help! I need this now!

S_A_V [24]

Answer:

The solution is $x=6$

Step-by-step explanation:

The given equation is $2x+1-14x=-71$

We group like terms to obtain;

$2x-14x=-71-1$

We now simplify to get;

$-12x=-72$

We divide both sides of the equation by -12 to get;

$\frac{-12x}{-12}=\frac{-72}{-12}$

We cancel out the common factors to get;

$x=\frac{72}{12}$

This implies that

$x=\frac{12\times 6}{12}$

$x=6$

8 0

3 years ago

Suppose that the amount of time it takes to build a highway varies directly with the length of the highway and inversely with th

KatRina [158]

Answer:

21 weeks

Step-by-step explanation:

In this question, we are to use proportionality to find the solution to the question.

We were made to know that the time taken to build the highway is varied directly with the length and inversely with the number of workers.

Let us make a mathematical representation for this.

Let the time be t, number of workers be w and length be l

t is directly proportional to l and inversely proportional to w

Mathematically;

t = kl/w

Where k is the constant of proportionality.

Let’s find the value of k

150 workers built 12 miles of highway in 14 weeks ; plug these in the equation to get k

14 = k * 12/150

k = 150 * 14/12 = 175

Now we want to get t given w and l

from ;

t = kl/w

We can get t; where l = 15 and w = 125

t = 175 * 15/125

t = 21 weeks

4 0

3 years ago

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BigorU [14]

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