Answer:
x = -4.5
Step-by-step explanation:
<u><em>Solving the equation</em></u> :
Question 5 and 6 are the same.
Answer:
45
Step-by-step explanation:
These work problems are always done in terms of fractions ie if both (Kevin & Eric) took 30mins to mow and Kevin took 1.5hrs (90mins) alone then we can make an equation like below
1/time took for both = 1/time took for Kevin + 1/time took for Eric
1/30 = 1/90+1/x ==> calling time took for Kevin x
solving the above 1/x = 1/30-1/90
1/x=2/90
x=45
=
(
−
2
y
)
(
2
)
+
6
y
−
1
+
−
1
(
(
−
4
y
)
(
2
)
−
3
y
+
9
)
=
(
−
2
y
)
(
2
)
+
6
y
+
−
1
+
−
1
(
(
−
4
y
)
(
2
)
)
+
−
1
(
−
3
y
)
+
(
−
1
)
(
9
)
=
(
−
2
y
)
(
2
)
+
6
y
+
−
1
+
8
y
+
3
y
+
−
9
=
−
4
y
+
6
y
+
−
1
+
8
y
+
3
y
+
−
9
Combine Like Terms:
=
−
4
y
+
6
y
+
−
1
+
8
y
+
3
y
+
−
9
=
(
−
4
y
+
6
y
+
8
y
+
3
y
)
+
(
−
1
+
−
9
)
=
13
y
+
−
10
