30
May
2019
May
2019
Week 15 – Math 10
categories: Math 10
this week in math 10 – we learned about the method of substitution.
substitution is the algebraic method of finding a solution for a system.
when doing the method of substitution – remember BFSD
B- brackets àexpand
F – Fraction àeliminate fractions
S – Sorting àorganize the numbers and like terms.
D – Divideànumber infant of Y
example:
x + 3y = 19 àrearrange àx = -3y +19
–> 4x- 2y à4(-3y +19) -2y = -12y + 76
= -10y +76
-10 -10
Y = 66
NOW USE Y TO SOLVE FOR X
X + 3y = 19 àx + 3(66) =19
3 x 66 = 198 + x = 19
X= -179