Question

Jordan wants to solve the following system using the elimination method:2x + 3y = 10x + y = 7what numbers should the equation x + y = 7 be multiplied by to eliminate ya. -2b. 2c. -3d. 3

Answer 1

In elimination method one equation is multiplied by the negative coefficient of the other

so then in this case y have coefficient 3, the other equation have coefficient y is 1 . Then divide 3/1 = 3 and change sign ,gives -3.

Then the final answer is -3, option c)