sum of 2 numbers is 40. taking numbers as x and y form an equation. if the numbers are subtracted the answer is 10. form another equation based on this. and find the numbers. pls find the answer for me fast. its a little important. thank you.
Answers
Answer:
Ncert solutions
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Mathematics
Science
Chapters in NCERT Solutions - Mathematics, Class 7
Exercises in Simple Equations
Question 26
Q4) Write equations for the following statements:
(i) The sum of numbers x and 4 is 9. (ii) 2 subtracted from y is 8.
(iii) Ten times a is 70. (iv) The number b divided by 5 gives 6.
(v) Three-fourth of t is 15. (vi) Seven times m plus 7 gets you 77.
(vii) One-fourth of a number x minus 4 gives 4.
(viii) If you take away 6 from 6 times y, you get 60.
(ix) If you add 3 to one-third of z, you get 30.
Solution
Transcript
Solution 4:
(i) x+4=9
x=9-4
x= 5
(ii) y-2=8
y=8+2
y=10
(iii) a\times10\ =\ 70
(iv) \frac{b}{5}=\ 6\
b= 30
(v) \frac{3}{4}\times t\ =\ 15\
t\ =\ 15\times\frac{4}{3}
t = 20
(vi) \frac{b}{5}=\ 6\
b\ =\ 6\ \times5\
b = 30
(vii) \left(\frac{1}{4}\times x\right)-\ 4\ =\ 4\
\frac{x}{4}-\ 4\ =\ 4\
\frac{x}{4}=4+4\
x\ =\ 8\times4
x= 32
(viii) 6y-6 = 60
6y = 60+6
6y = 66
y\ =\ \frac{60}{6}
y = 11
(ix) \frac{z}{3}+\ 3\ =\ 30\
\frac{z}{3\ }=\ 33
z\ =\ 33\times3
z = 99
Data communication refers to the exchange of data between a source and a receiver via form of transmission media such as a wire cable. ... The device that transmits the data is known as source and the device that receives the transmitted data is known as receiver.
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