Solve these equations 1) k - 18 = -29 2) -6r - 7 = -115 3) 9 = 10 + n/20 4) 7x + 6(2-7x) =-233 5) -353 = 7 (1 - 6x) - 3x 6) |10m| = 100 7) |4x - 9| = 3 8) x-6/5 = 1/2

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places