You simplify expressions and solve equations. You don't simplify something that has an equal sign, and you don't solve something that doesn't have an equal sign. For examples, you simplify 2/4 and solve x + 0 = 1
1/2
You can't. You need 2 equations to solve for 2 unknowns
The answer is that it cannot be done. To solve a set of equations in k variables (in this case, 2) you need at least two independent equations.
You can't solve it - you only have one equation and two unknowns. You need 2 equations to solve this.
7
You simplify expressions and solve equations. You don't simplify something that has an equal sign, and you don't solve something that doesn't have an equal sign. For examples, you simplify 2/4 and solve x + 0 = 1
1/2
You can't. You need 2 equations to solve for 2 unknowns
1+1=2
The equations in math textbooks are of two types: 1) Equations like (a+b)^2 = a^2 +2ab + b^2. This is a formula, rule or theorem which tells you how to square a binomial. These theorems have been proven and collected over hundreds of years by mathematicians. 2) Find the solution set to x^2 + 5x -14 = 0. There are hundreds of equations in the exercise sets of any math text. The authors of the text make them up, and organize them so that they gradually get harder, and you can get better at solving them as you go through the exercises. ( The answer is { -7, 2 }. )
To solve for 2 unknown variables you need 2 independent equations. You have only 1.
The answer is that it cannot be done. To solve a set of equations in k variables (in this case, 2) you need at least two independent equations.
You can't solve it - you only have one equation and two unknowns. You need 2 equations to solve this.
You multiply one or both equations by some constant (especially chosen for the next step), and add the two resulting equations together. Here is an example: (1) 5x + 2y = 7 (2) 2x + y = 3 Multiply equation (2) by -2; this factor was chosen to eliminate "y" from the resulting equations: (1) 5x + 2y = 7 (2) -2x -2y = -6 Add the two equations together: 3x = 1 Solve this for "x", then replace the result in any of the two original equations to solve for "y".
22
you need 2 equations to solve for 2 variables