Question

{4x+2y=10 y=2x-1What is the value of x+yA.3.125B.2C.4.5D.3.5​

Answer 1

Answer:

D.3.5

Step-by-step explanation:

4x+2y=10(given)

2x+y=5

y=5-2x-----(1)

y=2x-1------(2)(given)

Since the left side of the equations are the the same,

5-2x=2x-1

4x=6

x=1.5

Sub x=1.5 into eq(1),

y = 5-2(1.5) = 5-3 = 2

so, x+y = 1.5+2 = 3.5

Answer 2

Answer:

4x+2y=10

y=2x-1

4x+2(2x-1)=10

4x+4x-2=10

8x=10+2

8x=12

8x÷8=10÷8

x=1,25

&

y=2x-1

=2(1.25)-1

=1.5

x+y=1.25+1.5

=2,75