Solve equation
2x-3=21+10x

x = -3

Step-by-step explanation:

2x-3=21+10x

Subtract 2x from each side

2x-2x-3=21+10x-2x

-3 = 21 +8x

Subtract 21 from each side

-3-21 = 21-21 +8x

-24 = 8x

Divide each side by 8

-24/8 = 8x/8

-3 =x

europa2433

europa2433

step-by-step explanation:

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