Equations
Hong Kong
Stage 1 - Stage 3
Solutions to Linear Equations
Interactive practice questions
We want to determine whether $x=-1$x=−1 is a solution to the equation $\left(x-4\right)^2=25$(x−4)2=25, by using substitution.
a
Substitute $x=-1$x=−1 into the expression $\left(x-4\right)^2$(x−4)2:
b
Is $x=-1$x=−1 a solution to the equation $\left(x-4\right)^2=25$(x−4)2=25?
No
A
Yes
B
Easy
2min
Consider the equation $9\left(n+5\right)=4n+50$9(n+5)=4n+50 for $n=1$n=1.
Easy
2min
Consider the equation $6a=3a-3$6a=3a−3 for $a=-1$a=−1.
Easy
1min
We want to determine whether $x=-1$x=−1 is a solution to the equation $\left(x-2\right)^2=9$(x−2)2=9, by using substitution.
Easy
1min
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