6/7 1 whole 2/21 × 5/42 ÷ 7/15 - 1/6
please answer me step by step please .
Answers
Step-by-step explanation:
10p = 100
(dividing both sides by 10)
\frac{10p}{10}\ =\ \frac{100}{10}
p = 10
(b) 10p +10 = 100
(subtract both sides by 10 )
10p + 10 -10 = 100-10
10p = 90
dividing both sides by 10
\frac{10p}{10}=\ \frac{90}{10}
p = 9
(c) \frac{p}{4}=\ 5
multiplying both sides by 4
\frac{p}{4}\ \times4\ =\ 5\times4
p = 20
(d) -\frac{p}{3}=5
multiplying both sides by 3
-\frac{p}{3}\times3\ =\ 5\times3
p\ =\ -15
(e) \frac{3p}{4}=6
multiplying both sides by 4
\frac{3p}{4}\times4\ =\ 6\times4
3p\ =\ 24
dividing both sides by 3
\frac{3p}{3}=\ \frac{24}{3}
p\ =\ 8
(f) 3x= -9
dividing both sides by 3
\frac{3x}{3}=\ -\frac{9}{3}
x=\ -3
(g) 3s +12 = 0
subtracting both sides 12
3s +12 -12 = 0-12
3s = -12
dividing both sides by 3
\frac{3s}{3}\ =\ -\frac{12}{3}
s\ =\ -4
(h) 3s=0
dividing both sides by 3
\frac{3s}{3}=\frac{0}{3}
s= 0
(i) 2q = 6
dividing both sides by 2
\frac{q}{2}=\ \frac{6}{2}
q= 3
(j) 2q-6 = 0
adding 6 both sides
2q-6+6 = 0+ 6
2q = 6
dividing both sides by 2
\frac{q}{2}=\ \frac{6}{2}
q = 3
(k) 2q + 6 = 0
subtracting 6 on both sides
2q+6-6 = 0-6
2q=-6
dividing both sides by 2
q= -3
(l) 2q+6 = 12
subtracting 6 both sides