exam Maths Puzzle Numerical Ability

Solve the system by substitution.
3x - y = -7
x + y = -9

Help!! I am pulling my hair out! :0) I need help with substitution, I am not understanding. Can someone please help me. Thanks.

Read Solution (Total 0)

exam Other Question

1. 5(x - 2)^2=3

2. Find the x-intercepts. y = x^2 + 3x - 8

3. Find the axis of symmetry. "y = x^2 - 5 + 10"
4. Solve. (x - 3)^2 = 6 how do I solve this problem for radical equations.
1. (x-2)to the 1/3 power=5 Check for extraneous solution.