1. Combine like terms: We have 3n and 4n as like terms, so when we add them together, we get 7n. The equation becomes 7n + 9 = 2.
2. Subtract 9 from both sides: To isolate the variable, we need to get rid of the constant term 9. By subtracting 9 from both sides of the equation, we have 7n = 2 - 9, which simplifies to 7n = -7.
3. Divide both sides by 7: To solve for n, we need to get rid of the coefficient 7 that is multiplied with n. By dividing both sides of the equation by 7, we obtain n = -7/7, which simplifies to n = -1.
Therefore, the steps to solve the equation 3n + 9 + 4n = 2 are:
1. Combine like terms: 3n + 4n = 7n. The equation becomes 7n + 9 = 2.
2. Subtract 9 from both sides: 7n + 9 - 9 = 2 - 9. The equation simplifies to 7n = -7.
3. Divide both sides by 7: 7n/7 = -7/7. The equation simplifies to n = -1.
Put the steps in order to solve the equation: 3n+9+4n=2
. Put the reasoning in the first blank and the simplified equation in the second blank.
2 answers
The base of a triangle is 4 less than three times the height. The area of the triangle is 38 square cm. A=b × h
An expression for the base of the triangle:. Response area
Equation for the area of the triangle: Response area
The first step in solving for h:
An expression for the base of the triangle:. Response area
Equation for the area of the triangle: Response area
The first step in solving for h:
1 answer