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Basic Math
Arithmetic
Fractions & Decimals
Ratios & Proportions
Percentages
Basic Number Theory
Pre-Algebra
Integers & Absolute Values
Factors & Multiples
Prime Factorization
Basic Equations & Inequalities
Coordinate Plane & Graphing
Algebra
Linear Equations & Inequalities
Quadratic Equations
Polynomials & Factoring
Functions & Graphs
Systems of Equations
Trigonometry
Trigonometric Functions
Trigonometric Identities & Equations
Right Triangle Trigonometry
Unit Circle
Graphing Trigonometric Functions
Calculus
Limits & Continuity
Derivatives & Applications
Integrals & Applications
Series & Sequences
Multivariable Calculus
Precalculus
Functions & Graphs
Polynomial & Rational Functions
Exponential & Logarithmic Functions
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Example
3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b
Question
$$21 \div 1.5$$
Evaluate
$14$
Solution Steps
Expand $\frac{21}{1.5}$ by multiplying both numerator and the denominator by $10$.
$$\frac{210}{15}$$
Divide $210$ by $15$ to get $14$.
$$14$$
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Factor
$2\times 7$
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