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Georgia [21]
3 years ago
11

Solve for the value of x in this equation: -10x+17x-2 = 5(x+4)

Mathematics
2 answers:
Basile [38]3 years ago
4 0

Answer:

\huge{ \bold{ \boxed{ \tt{x = 11}}}}

Step-by-step explanation:

\text{ - 10x + 17x - 2 = 5(x + 4)}

Subtract 10x from 17x

10x and 17x are like terms. So, the coefficients of like terms can be added or subtracted.

\dashrightarrow{ \sf{ 7x - 2 = 5(x + 4)}}

Distribute 5 through the parentheses

\dashrightarrow{ \sf{7x - 2 = 5 \times x  + 5 \times 4}}

\dashrightarrow{ \sf{7x - 2 = 5x  +  20}}

Move 5x to left hand side ( L.H.S ) and change it's sign

Similarly , move 2 to right hand side ( R.H.S ) and change it's sign

\dashrightarrow{ \sf{7x - 5x =   20 + 2}}

Subtract 5x from 7x

\dashrightarrow{ \sf{2x =  20 + 2}}

Add the numbers : 20 and 2

\dashrightarrow{ \sf{2x = 22}}

Divide both sides by 2

\dashrightarrow{ \sf{ \frac{2x}{2}  =  \frac{22}{2}}}

\dashrightarrow{ \boxed{ \sf{x = 11}}}

--------------------------------------------------------------

Now, let's check whether the value of x is 11 or not.

<h3>Verification :</h3>

L.H.S = n\sf{ - 10x + 17x - 2}

Plug the value of x and simplify

\longrightarrow{ \sf{ - 10 \times 11 + 17 \times 11 - 2}}

\longrightarrow{ \sf{ - 110 + 187 - 2}}

\longrightarrow{ \sf{77 - 2}}

\dashrightarrow{ \sf{75}}

R.H.S = \sf{5(x + 4)}

plug the value of x and simplify

\longrightarrow{ \sf{5(11 + 4)}}

\longrightarrow{ \sf{5 \times \: 15}}

\longrightarrow{ \sf{75}}

L.H.S = R.H.S

The value of x is 11 .

--------------------------------------------------------------

<h3>Rules for solving an equation :</h3>
  • If an equation contains fractions , multiply each term by the LCM of denominators.
  • Remove the brackets , if any.
  • Collect the terms with the variable to the left hand side and constant terms to the right side by changing their signs ' + ' into ' - ' and ' - ' into ' + '
  • Simplify and get the single term on each side.
  • Divide each side by the coefficient of variable and then get the value of variable.

Hope I helped!

Best regards :D

~\text{TheAnimeGirl}

zepelin [54]3 years ago
3 0
Ok here are the steps and the answer

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