Question

# Consider the following system of linear equations: 4x+2y=25 4x-y=-5 If the value of y is 10 what is the value of X for this system: 1.1.25 2.11.25 3.1.45 4.5

Equations
Consider the following system of linear equations:
4x+2y=25
4x-y=-5
If the value of y is 10 what is the value of X for this system:
1.1.25
2.11.25
3.1.45
4.5

2021-05-05
Step 1
Given the system of equations
4x+2y=25
4x-y=-5
If value of y is 10 then we need to find the value of x.
Now,
If value of y is 10 then it must satisfy to both equations
By putting the value of y in equation first then we get
$$\displaystyle{4}{x}+{2}\times{10}={25}$$
4x+20=25
4x=25-20
4x=5
$$\displaystyle{x}={\frac{{{5}}}{{{4}}}}$$
x=1.25