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Reason What is a first step to solving for x
in the equation 9x - 7 = 10? How would you
check your solution? © MP.2

Sagot :

Hannah112579idn

Answer:

Answer: Do -7 + 7 and do the same to 10, (7 + 10). This is the first step in Isolating the variable.

Step-by-step explanation:

hope it's right

DᴀʀᴋPᴀʀᴀᴅᴏxidn

[tex]\large \mathfrak{Solution : }[/tex]

let's solve for x :

first step : adding 7 on both sides

  • [tex]9x - 7 = 10[/tex]

  • [tex]9x - 7 + 7 = 10 + 7[/tex]

  • [tex]9x = 17[/tex]

next step : dividing by 9 on both sides :

  • [tex] \dfrac{9x}{9} = \dfrac{17}{9} [/tex]

  • [tex]x = \dfrac{17}{9} [/tex]

now, let's check for the solution by Plugging the value of x as 17 / 9 in the above equation.

  • [tex]9x - 7 = 10[/tex]

  • [tex](9 \times \dfrac{17}{9} ) - 7 = 10[/tex]

  • [tex]17 - 7 = 10[/tex]

  • [tex]10 = 10[/tex]

we can see that the LHS = RHS, therefore our value for x is correct. i.e 17 / 9

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