This week we learned verifying a solution.
1 solution: m1 Is not equal to m2. no solution: m1=m2, b1=b2. coincident solution: m1=m2, b1=b2.
And then we learned substitution.
An algebraic method of finding solution for systems.
For example, x+4y=-3 ->x=-4y-3
First, we nned to find the x or y who is It’s independent. It’s easy to calculate.
We know y=-2, We can substitute y into the original formula. So the answer is (5, -2).
Steps: 1 pick one equation and rearrarrge so it is x or y.
2 substitute this into the other equation. (use brackets)
3 solve equation.
4 substitute the number just found, back into the rearranged equation.
5 verify solution.