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2a ÷ 2 = 18 ÷ 2 a = 18 ÷ 2 aᎏᎏ= ᎏᎏ9 ᎏ 2a ᎏᎏ 2 18 = ᎏ2ᎏ a=9 Another method is as follows: 87. Divide both sides of the equation by 4. Apply the rules for operating with signed numbers. Another look for this solution method is as follows: 88. Divide both sides of the equation by −3. Apply the rules for operating with signed numbers. 89. Divide both sides of the equation by 27. 4x ÷ 4 = −20 ÷ 4 x = −20 ÷ 4 − xᎏᎏ= ᎏᎏᎏ5 ᎏ 4x ᎏᎏ 4 20 = −ᎏ4ᎏ x = −5 −3y ᎏ− ᎏ 3 18 = ᎏ−3ᎏ 18 y = ᎏ−3ᎏ y = −6 27b ᎏᎏ 27 9 = ᎏ27ᎏ 9 b = ᎏ27ᎏ Reduce fractions to their simplest form.
PEMDAS: Evaluate the term with the exponent. Signs the same? Multiply the terms and give the result a positive sign. Substitute. Now evaluate the other term. Signs different? Multiply and give the result a negative sign. Substitute the equivalent values into the original expression. Change the operator to addition and the sign of the number that follows. The simpliﬁed value of the expression is as follows: 31. Substitute the values for the variables into the expression. PEMDAS: Multiply the terms in the expression.
PEMDAS: Multiply the terms in the expression. Substitute the equivalent values into the original expression. Signs different? Divide and give the result a negative sign. 25 501 Algebra Questions 32. Substitute the values for the variables into the expression. Group terms using order of operations. PEMDAS: Multiply or divide the terms in the expression. Signs different? Multiply and give the result a negative sign. Consider the second term. Signs different? Divide and give the result a negative sign.
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