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Q: What is usually the first step in solving a system of equation by substitution?

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By elimination and substitution

The first step is to show the equations which have not been shown.

You are trying to find a set of values such that, if those values are substituted for the variables, every equation in the system is true.

A linear system is an equation to find the intersection of two or more lines. The equations are usually expressed with two variables, x and y. I don't know yet, but maybe geometry might have three variables, including z. Basically it's where two lines intersect and the most common ways of solving it are through graphing, substitution, and/or elimination.Presume you mean "linear".These are systems whose parameters vary directly or proportionally. Plotting functions results in straight lines.

The main advantage is that many situations cannot be adequately modelled by a system of linear equations. The disadvantage is that the system can often get very difficult to solve.

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True

The first step is usually to solve one of the equations for one of the variables.Once you have done this, you can replace the right side of this equation for the variable, in one of the other equations.

You use substitution when you can solve for one variable in terms of the others. By substituting, you remove one variable from the equation, which can then be solved. Once you solve for one variable, you can use substitution to find the other.

If you mean x+2y = -2 and 3x+4y = 6 then by solving the simultaneous equations by substitution x = 10 and y = -6

By elimination and substitution

The first step is to show the equations which have not been shown.

Isolating a variable in one of the equations.

You'd need another equation to sub in

how do you use the substitution method for this problem 2x-3y=-2 4x+y=24

You are trying to find a set of values such that, if those values are substituted for the variables, every equation in the system is true.

If the process of substituting leads to an identity rather than an equation then the system has infinitely many solutions.

A linear system is an equation to find the intersection of two or more lines. The equations are usually expressed with two variables, x and y. I don't know yet, but maybe geometry might have three variables, including z. Basically it's where two lines intersect and the most common ways of solving it are through graphing, substitution, and/or elimination.Presume you mean "linear".These are systems whose parameters vary directly or proportionally. Plotting functions results in straight lines.

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