Isolate — Grade 7 Accelerated, what it means and where it is taught
Get the variable alone on one side.
Taught in Grade 7 Accelerated.
Where it is taught
Practise this idea
5 questions in the course bank use Isolate, in Absolute Value, Piecewise & Step Functions, Radical Functions & Equations, Trigonometric Identities & Equations.
Problem 1
Solve 2|x| + 5 = 17.
Worked answer
6 and -6
2|x| = 12
|x| = 6
x = ± 6
Problem 2
Solve 3|x - 1| - 5 = 10.
Worked answer
6 and -4
3|x-1| = 15
|x - 1| = 5
x = 6 or x = -4
Problem 3
Solve √x+3=8.
Worked answer
25
√x=5
x=25
Problem 4
Solve 2√x-1 = 9.
Worked answer
25
2√x=10
√x=5
x=25
Problem 5
Solve 2sinθ-1=0 for 0° ≤ θ < 360°. Give both, smallest first.
Worked answer
30,150
sinθ=12
30° and 150°