6. 5x 2 10 5 240 7. 4x 1 9 5 16 2 3x 8. 5(3x 2 20) 5 210 9. 3(2x 1 11) 5 9 10. 2(2x 2 5) 5 12 11. 44 2 2(3x 1 4) 5 218x 12. 4(5x 2 9) 5 22(x 1 7) 13. 2x 2 15 2 x 5 21 1 10x 14. 3(7x 2 9) 2 19x 5 215

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Which expression is equivalent to -5(3x - 6/7)