ALGEBRA AND GEOMETRY 5

The sum of the double of a number and five

Note: Use the letter shown

The difference between a number and four

Note: Use the letter shown

The product of a number and seven

Note: Use the letter shown

Check if x=2 is the solution of 2(x+7)=12+3x

• NO

• YES

Solve 5x-5=+x+2x-7

• x=1

• x=-1

• x=2

• x=-2

Solve 3(x-5)=3

• x=1/6

• x=6

• x=18

Solve 3x-5=2x-(3+x)

• x=1

• x=-1

• x=2

Choose the correct formula to calculate the area of the figure

Check if x=3 is the solution of 3(2x-1)=12-3x

• NO

• YES

Check if x=3 is the solution of 3(2x-1)=6-3(x-1)+15

• NO

• YES