3. X + 5 5
X-5 3
Transform the expression
3(x +5) - 5(x - 5)
3 (x - 5)
Remove the parentheses
3x + 15 - 5x+ 25
(3x - 15)
Collect like terms
Calculate
answer
- 2x + 40
3x - 15
4.6 5
За + 2
2a + 3
Determine the defined range
6
3a +2
Cross-multiply
3 2
6 2a + 3 = 5 3a + 2)
12a + 18 = 15a + 10
Move the terms
12a - 15a = 10 - 18
Collect like terms Calculate
-3a = - 8
Divide both sides
a
8 3 a a =
Check the solution
Solution
co | M
Alternate form
2 a = 2 , a = 2.6 3
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Answers & Comments
3. X + 5 5
X-5 3
Transform the expression
3(x +5) - 5(x - 5)
3 (x - 5)
Remove the parentheses
3x + 15 - 5x+ 25
(3x - 15)
Collect like terms
Calculate
answer
- 2x + 40
3x - 15
4.6 5
За + 2
2a + 3
Determine the defined range
6
3a +2
2a + 3
Cross-multiply
3 2
6 2a + 3 = 5 3a + 2)
Remove the parentheses
12a + 18 = 15a + 10
Move the terms
12a - 15a = 10 - 18
Collect like terms Calculate
-3a = - 8
Divide both sides
a
8 3 a a =
3 2
Check the solution
Solution
a
co | M
Alternate form
2 a = 2 , a = 2.6 3