which one is easir to solve??
-2a+b=7
or 5a+b=-10
cannot solve either as separate equations
no they are the same but which one would you solve first (substitution method)
It doesn't matter. Both are equally as easy.
To determine which equation is easier to solve, we can compare the two equations based on their coefficients and constants.
Let's start with the first equation, -2a + b = 7. This equation has a coefficient of -2 for 'a' and a coefficient of 1 for 'b'. It also has a constant term of 7.
Now, let's move on to the second equation, 5a + b = -10. This equation has a coefficient of 5 for 'a' and a coefficient of 1 for 'b'. It has a constant term of -10.
Based on a direct comparison, both equations have the same coefficient for 'b' and a constant term. The only difference is in the coefficient for 'a', -2 in the first equation and 5 in the second equation.
Generally, when comparing equations, the equation with the smaller coefficient for 'a' is easier to solve because it requires less manipulation. In this case, -2 is smaller than 5, so the first equation, -2a + b = 7, is easier to solve.