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New Zealand
Level 6 - NCEA Level 1

Check Solutions to Linear Equations

Interactive practice questions

We want to determine whether $x=-1$x=1 is a solution to the equation $\left(x-4\right)^2=25$(x4)2=25, by using substitution.

a

Substitute $x=-1$x=1 into the expression $\left(x-4\right)^2$(x4)2:

b

Is $x=-1$x=1 a solution to the equation $\left(x-4\right)^2=25$(x4)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=3a3 for $a=-1$a=1.

Easy
1min

We want to determine whether $x=-1$x=1 is a solution to the equation $\left(x-2\right)^2=9$(x2)2=9, by using substitution.

Easy
1min
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Outcomes

NA6-5

Form and solve linear equations and inequations, quadratic and simple exponential equations, and simultaneous equations with two unknowns

91027

Apply algebraic procedures in solving problems

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