Question

Drow the graph of the equation 2x+y=7 from the graph find the value of X when y=1​

Answer 1

Answer:

Often it is necessary to look at several functions of the same independent variable. Consider the prior example where x, the number of items produced and sold, was the independent variable in three functions, the cost function, the revenue function, and the profit function.

In general there may be:

n equations

v variables

Solving systems of equations

There are four methods for solving systems of linear equations:

a. graphical solution

b. algebraic solution

c. elimination method

d. substitution method