16 October 2019
WALT: Solve algebraic equations
SC: To be successful I must…
- Rewrite the equation in a linear form.
- Solve the equation from back to front using the inverse.
- Substitute the value of the variable to the original equation and check the answer.
-5
5n +5 = 45 - 5
5n = 40
5 5
n = 8
+3
y/6 - 3 = -11 + 3
y/6 = -8
y/6 x 6 = -8 x 6
y = -48
4(g - 1) = 24/4
4
g - 1 = 6
+1
g - 1 = 6 + 1
g = 7
V + 9 = 0 x 15
15 x 15
-9
V + 9 = 0 - 9
v = -9
- 8
-40 - 8 = 12x + 8
-48÷12 = 12x
12
-4 = x
+3
-2p - 3 = -19 + 3
-2p = -16
-2 -2
p = 8
13 x 2 = w - 14
2 x 2
+14
26 + 14 = w - 14
40 = w
-1
36 -1 = 1 + 7a
35 = 7a
7 7
5 = a
+11
-9 + 11 = -11 + b/8
2 = b/8
2 x 8 = b/8 x 8
16 = b
