Answer:
x= 21/2 = 10.500
Step-by-step explanation:
2.2 Solve : 2x-21 = 0
Add 21 to both sides of the equation :
2x = 21
Divide both sides of the equation by 2:
x = 21/2 = 10.500
x = 21/2 = 10.500
The solution of the equation for the unknown value x is decimal number 10.5. Option C is correct.
The solution of an equation is the value of the variable of the equation, for which the equation is satisfied.
To solve an equation for its variable, isolate the variable on one side of the equation using the mathematical operations.
The equation of unknown value x is given as,
4x = 42
This equation has to be solved for x. For this isolate the x divide the equation with 4 both side.
(4x/4)=(42/4)
x=10.5
Hence, the solution of the equation for the unknown value x is decimal number 10.5. Option C is correct.
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