Step-by-step explanation:
We need to solve 5x+10=25 ....(1)
Step 1.
Subtract 10 to both sides of the above equation.
5x+10-10=25-10
5x=15
Step 2,
Divide each side by 5.
If we want to check whether it is correct or not, step are as follows :
Put x = 3 in equation (1)
5(3)+10=15+10
=25
It means that the above steps are correct.
Answer:
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Answer:
B
Step-by-step explanation:
Yes, it is. The set of rational numbers is closed for all the four operations, so x+y, x-y, x*y and x/y are rational too. And it is easy to demonstrate. A rational number can be expressed as a fraction of two integers. So, x can be expressed as a/b and y as c/d. Hence x+y = a/b + c/d = (ad+bc)/bd, which, as fraction of two integers, is rational.
Answer:
see explanation
Step-by-step explanation:
(i)
+ 
= 1 ( multiply through by 6 to clear the fractions )
2x + 3y = 6 ( subtract 2x from both sides )
3y = - 2x + 6 ( divide through by 3 )
y = - 
x + 2
(ii)
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope ( gradient ) and c the y- intercept )
y = - x + 2 ← is in slope- intercept form ( that is part (i)
with gradient m = -
