Question

Write the equation of Number
multiplied by 3 plus 7​

Answer 1

answer 5

Use a variable to represent the unknown number, n. Then write an equation from what is stated in the problem. Finally, use inverse operations to solve for n.

Add 7 to a number (n): n+ 7

Multiply it by 3: (n+7) x 3

We get 36: (n+7) x 3 = 36

Now undoing this equation to solve for n, use opposite (inverse) operation. Goal is to get the variable by itself:

Divide by 3 on both sides: (n+7) x 3 / 3 = 36/3

n + 7 = 12

Subtract 7 on both sides: n + 7 -7 = 12 -7

n = 5

Always check your work. Substitute 5 in to equation everywhere you used n to make sure it checks out. (n+7) x 3 = 36 (5+7) x3 =36 PEMDAS

SO parentheses first, we obtain 12 then multiply by 3 and ensure it equals 36!

Answer 2

$\large\bold{{\underline{\underline{\red{Answer:}}}}}$

$\small{ }$

Let the number be ' x ' , then the equation will be:

$\large\mathtt{{\underline{\underline{3x+7}}}}$

$\small{ }$

$\huge\bold\red{Hope~it~helps..!!}$