4b+3=15 4b=15-3 b=(15-3)/4 b=3
1 If: 2x+5y = 16 and -5x-2y = 2 2 Then: 2*(2x+5y =16) and 5*(-5x-2y = 2) is equvalent to the above equations 3 Thus: 4x+10y = 32 and -25x-10y = 10 4 Adding both equations: -21x = 42 or x = -2 5 Solutions by substitution: x = -2 and y = 4
If you mean: 4n-2n = 4 then 2n = 4 and n = 2
three things: 1) that the value of 4 is equal to the value of 4. 2) you did not obtain any revealing information. 3) your strategy for solving that system of equations was not good.
{-1,-2}
You will have to break it down, for example: 5x + 40= 60 -40 -40 ----------- 0 20 so 20 divided by 5 is 4 so x equals 4, thats how you do it,.
Solving equations in two unknowns requires two independent equations. Since you have only one equation there is no solution.
x=3
Inconsistent linear equations in two variables.
4b+3=15 4b=15-3 b=(15-3)/4 b=3
An example of a two step equation that equals 2 is 4 + 2x = 2. In this equation, x = -1.
They appear to be the equations of two parallel lines in the a-b plane.
When x = -2 then y = 4 which is the common point of intersection of the two equations.
None. When these two equations are graphed, the two lines are parallel. Since they never intersect, there is no point that satisfies both equations.
These are two expressions, not equations. Expressions do not have solutions, only equations do. NB equations include the equals sign.
There are two equations in the question, not one. They are the equations of intersected lines, and their point of intersection is their common solution.
Two equations: a linear one in y and a quadratic in x.