I believe this is substitution

algebra2

2x+3y-2z=1

-x-y+2z=5

3x+2y-3z+=-6

What is the sum of (-a+5c) + (-7a+2c+3)

Jay bought a CD for $15.99 and rented a movie for $1.99. He paid with a $20 bill. How much change did he receive?

Two numbers are in a ratio of 7:4. The sum is 220. Find the bigger number

The expression of 12xyz - 45 is a? A) monomial B) binomial C) trinomial D) constant

What number is 5 more than negative 2?

I need an equation from this question so I can graph and solve by substitution and elimination. The question the following, Stefan's school is selling tickets to annual dance competition.

Evaluate the expression for x = 13, y = 7: y + 5 Enter the correct answer.

Which represents a measure of volume? A. 5 cm3 B. 5 square cm C. 5 cm D. 5 cm?

Immediately after giving birth, one woman weighed 177 pounds. She looses approcimately 4 lbs per month. Her goal is to get back to her pre-pregnancy weight of 135 pounds. What will her weight be in 3.5 months after giving birth?

There are 221 students on a field trip 5 students ride in a van the rest of the students fill 6 buses enter an equation that can be solved to find the number of students