Transcript Solving Two-Step Equations

Solving Two-Step
Equations
#34
Example 1
Solve each equation.
 18 + 3x = 30
FYI
Helpful Hint
Undo operations in the reverse of the
Order of Operations. First undo
addition or subtraction. Then undo
multiplication or division.
Example 2
 Solve.
Check the answer.
x
–2=
3
1
Example 3
Solve. Check the answer.
x + 19 =
4
6
Example 4
Solve each equation .
x – 16 =
3
9
Example 5
Solve. Check the answer.
x-9
10
= 49
Example 6
The rule for a certain function is to
multiply the input by 5 and subtract 4.
Find the input value when the output is
11.
Real-world Application 1
 Kaia
earned $425 last week. She wants
to put $350 in the bank and buy some
DVDs. Each DVD costs $25. Write a
two-step equation to represent the
situation. Then solve the equation. How
many DVDs can she buy?
Real-world Application 2
Nancy saved $87 of the money she made
babysitting. She wants to buy CDs that
cost $15 each, along with a set of
headphones that costs $12. How many
CDs can she buy?