Question

The value of x is 10 more than 5 times the value

of y. The sum of the two numbers is 4. Write,
two equations and graph to find the values of x
and y.

Answer 1

x=10+5y

4=x+y

Explanation:

substitute

4=10+5y+y

4-10=6y

-6=6y

-1=y

x=5

Answer 2

Explanation:

x = 5y+10

y = y

The sum of the two numbers is 4

therefore,

5y+10+y = 4

6y+ 10 = 4

6y = 4 -10

6y = -6

y = -1

X = 5y+10

X = 5 ×(-1)+10

X = 5

hence, y is -1 and X is 5