Solving Systems of Linear Equations by Substitution

5. Systems of Linear Equations / Solving Systems of Linear Equations by Substitution / 문제 4

문제 4

Use substitution to solve for: { 9x - 2y = 7 ; y = (5x + 1)/2 }. Find the value of x and show all of your work.

x = 8

x = 1

x = -2

x = 2