#41. Solve each equation. 1: Solving Two-Step Equations 18 + 3x = 30.
-
Upload
lorin-chapman -
Category
Documents
-
view
213 -
download
0
description
Transcript of #41. Solve each equation. 1: Solving Two-Step Equations 18 + 3x = 30.
SOLVING TWO-STEP EQUATIONS#41
Solve each equation.
1: Solving Two-Step Equations
18 + 3x = 30
Undo operations in the reverse of the Order of Operations. First undo addition or subtraction. Then undo multiplication or division.
Helpful Hint
Example 2: Solving Two-Step Equations
– 2 = 1Solve. Check the answer.
x3
Example 3: Solving Two-Step Equations
= 6
Solve. Check the answer. x + 19
4
Example 4
7 x – 5 = 23Solve each equation .
Example 5 Solve each equation .
x – 16 = 93
Example 6
= 49
Solve. Check the answer. x - 910
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?
Example 7: Consumer Math Application
Example 8Kaia 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?
Example 9: Working Backward with Function Rules
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.
Example 10 The rule for a certain function is to multiply the input by 2 and subtract 8. Find the input value when the output is 3.