Need help with this 20 question test

Need help with this 20 question test

Solve and check the linear equation.

1. 0.30(80) + 0.60x = 0.40(80 + x)

2. 0.40x – 0.20(50 + x) = -0.04(50)

3. 9x – (7x – 1) = 2

4. Solve the equation by factoring.

2x² – 15x = 8

5. -6x – 2 = (3x + 1)^{^2}