Solving Basic 1-variable Equations With Rounding

Objective

Know how to solve equations with 1 variable

Example

Solve for y. Round to the nearest tenth.

-44 x y = 4

Answer: y = -0.1

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Explanation

These questions are just like equations with integer answers, except you may need to round at the end. Use a calculator to calculate.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Examples

Example 1

Solve for a. Round to the nearest tenth.

a x 7 = 2.4

a x 7 = 2.4

÷ 7 ÷7

a = 0.342857143

rounding to nearest tenth...

a = 0.3

Answer: 0.3

~~~~~~~~~~~~~~~~~~~

Example 2

Solve for j. Round to the nearest tenth.

j ÷ 2.5 = 3.5

j ÷ 2.5 = 3.5

x 2.5 x 2.5

j = 8.75

Answer: 8.8

~~~~~~~~~~~~~~~~~~~

Example 3

-8.1 = 9.4 + c

-8.1 = 9 + c

-9.4 -9

-17.5 = c

Answer: -17.5

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Practice your skills