3x^2+3(3+4)=48

Solution for 3x^2+3(3+4)=48 equation:

Simplifying
3x2 + 3(3 + 4) = 48

Combine like terms: 3 + 4 = 7
3x2 + 3(7) = 48

Multiply 3 * 7
3x2 + 21 = 48

Reorder the terms:
21 + 3x2 = 48

Solving
21 + 3x2 = 48

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-21' to each side of the equation.
21 + -21 + 3x2 = 48 + -21

Combine like terms: 21 + -21 = 0
0 + 3x2 = 48 + -21
3x2 = 48 + -21

Combine like terms: 48 + -21 = 27
3x2 = 27

Divide each side by '3'.
x2 = 9

Simplifying
x2 = 9

Take the square root of each side:
x = {-3, 3}