Year 9 Interactive Maths - Second Edition

Equations Involving Multiplication

Example 5

Solve 7x = 14 for x.

Solution:

Note:

The balance is preserved when the same number divides both sides of an equation.

Problem Solving

Example 6

If twice a number is equal to 12, find the number.

Solution:

Let x be the number.

Twice x is 2x, which is given as 12.

So, the number is 6.

Study Another Topic in Chapter 2: Linear Equations and Inequalities

[ Linear Equations ] [ Equations Involving Subtraction ] [ Equations Involving Multiplication ] [ Equations Involving Division ] [ Equations Involving Two or More Operations ] [ Equations Containing Brackets ] [ Equations Containing Fractions ] [ Linear Inequalities ] [ Adding a Number to Each Side of an Inequality ] [ Multiplying Each Side of an Inequality by a Positive Number ] [ Dividing Each Side of an Inequality by a Positive Number ] [ Multiplying Each Side of an Inequality by a Negative Number ] [ Dividing Each Side of an Inequality by a Negative Number ] [ Further Inequalities ] [ Inequalities Containing Brackets ] [ Inequalities Containing Fractions ] [ Formulas ] [ Rearrangement of Formulas ] [ Transpositions Involving Subtraction ] [ Transpositions Involving Division ] [ Transpositions Involving Multiplication ] [ Further Transpositions ] [ Transpositions Involving Brackets ] [ Transpositions Involving Fractions ] [ Problem Solving ] [ Problem Solving Unit ] [ Symbols ] [ Index ]