Solve the following equation
750-25c+20c=690
Solve for c
750 - 25c + 20c = 690
Group the c terms on the left:
(-25 + 20)c = -5c
Form modified equation
-5c + 750 = + 690
Divide each side by 750
| 750c | |
| 750 |
| = |
| -25 |
| 750 |
Group constants
Group our constants 750 and 690.
subtract 750 from both sides
-5c + 750 - 750 = 690 - 750
Cancel 750 on the left side:
-5c = -60
Divide each side of the equation by -5
| -5c | |
| -5 |
| = |
| -60 |
| -5 |
c = 12
Final Answer
c = 12
Common Core State Standards In This Lesson
6.EE.B.5, 6.EE.B.7, 8.EE.A.2, 8.EE.C.7.B, HSA.CED.A.1, HSA.REI.A.1, HSA.REI.A.2, HSA.REI.B.3, HSA.REI.B.4.B
What is the Answer?
c = 12
How does the Equation and Inequalities Calculator work?
Free Equation and Inequalities Calculator - Solves an equation or inequality with 1 unknown variable and no exponents as well as certain absolute value equations and inequalities such as |x|=c and |ax| = c where a and c are constants. Solves square root, cube root, and other root equations in the form ax^2=c, ax^2 + b = c. Also solves radical equations in the form asqrt(bx) = c. Also solves open sentences and it will solve one step problems and two step equations. 2 step equations and one step equations and multi step equations
This calculator has 1 input.
This calculator has 1 input.
What 3 formulas are used for the Equation and Inequalities Calculator?
One Step Equations (Division):
cx = b
x = b/c
One Step Equations (Addition): x + c = b x = b - c
One Step Equations (Subtraction): x - c = b x = b + c
One Step Equations (Addition): x + c = b x = b - c
One Step Equations (Subtraction): x - c = b x = b + c
What 4 concepts are covered in the Equation and Inequalities Calculator?
- equation
- a statement declaring two mathematical expressions are equal
- equation and inequalities
- unknown
- a number or value we do not know
- variable
- Alphabetic character representing a number
