Expanding a single bracket

Difficulty Stretch · Set h38hx3

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1
Expand and simplify9(6x+3)+12x— give the number of x.
2
Expand and simplify4(11x+3)+9x— give the number of x.
3
Expand and simplify11(3x+9)+11x— give the number of x.
4
Expand and simplify11(3x+10)+3x— give the number of x.
5
Expand and simplify9(5x+7)+11x— give the number of x.
6
Expand and simplify9(5x+8)+6x— give the number of x.
7
Expand and simplify2(5x+13)+5x— give the number of x.
8
Expand and simplify6(4x+6)+3x— give the number of x.
9
Expand and simplify4(8x+5)+2x— give the number of x.
10
Expand and simplify3(8x+8)+11x— give the number of x.
11
Expand and simplify9(6x+5)+12x— give the number of x.
12
Expand and simplify7(12x+3)+12x— give the number of x.
13
Expand and simplify9(5x+2)+3x— give the number of x.
14
Expand and simplify9(10x+11)+4x— give the number of x.
15
Expand and simplify11(12x+14)+5x— give the number of x.
16
Expand and simplify7(4x+12)+11x— give the number of x.
17
Expand and simplify7(8x+10)+8x— give the number of x.
18
Expand and simplify8(9x+11)+7x— give the number of x.
19
Expand and simplify6(9x+7)+8x— give the number of x.
20
Expand and simplify5(2x+6)+3x— give the number of x.

What is in this set

The numbers in this set run from 2 to 15.
A careful solution takes 3 written steps on average.
The mistake this set invites most often, in 100% of the problems: the bracket was dropped without multiplying.
Answers are a whole number.

Drawing 240 problems from this page produced 238 different ones, 99% — so a sheet of 20 is a new sheet almost every time.

The same skill, harder or easier

We would put this in front of a grade 7 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.