how do i solve two step equations?
Do you mean two equations in two unknowns? The method of substitution is one way.
There is a good tutorial here:
http://www.themathpage.com/alg/simultaneous-equations.htm
To solve a two-step equation, you need to isolate the variable on one side of the equation. Here is a step-by-step guide:
Step 1: Simplify both sides of the equation by using the order of operations (PEMDAS) if necessary.
Step 2: Undo addition or subtraction by performing the opposite operation. For example, if there's a +4 on one side, you should subtract 4 from both sides. If there's a -2 on one side, you should add 2 to both sides.
Step 3: Undo multiplication or division by performing the opposite operation. For example, if there's a 3 multiplying the variable on one side, you should divide both sides by 3. If there's a 2 dividing the variable on one side, you should multiply both sides by 2.
Step 4: Solve for the variable by simplifying and combining like terms if necessary.
Step 5: Check your answer by substituting it back into the original equation to ensure it satisfies the equation.
Remember to perform the same operation on both sides of the equation to maintain its balance.
If you are referring to solving a system of two linear equations with two unknowns, the method of substitution is one approach. It involves solving one equation for one variable and substituting that expression into the other equation to solve for the other variable. The tutorial link provided can further assist you in understanding and solving systems of equations.
I hope this explanation helps! Let me know if you have any further questions.