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प्रश्न
Write the given equation in statement form:
m − 7 = 3
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उत्तर
7 subtracted from m is 3.
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संबंधित प्रश्न
Set up an equation in the following case:
The teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7. The highest score is 87. (Take the lowest score to be l.)
Add 7xyz, − 5xyz, 9xyz, −8xyz
Simplify:
12x − [3x3 + 5x2 − {7x2 − (4 − 3x − x3) + 6x3} − 3x]
Write the following statement as an equation:
Twice a number subtracted from 19 is 11.
Verify by substitution that the root of 8 − 7y = 1 is y = 1
Solve the following equation and verify the answer:
6(1 − 4x) + 7(2 + 5x) = 53
Write the following statement in the form of the equation:
If you subtract 5 from 6 times a number, you get 7.
State which of the following are equations (with a variable). Give reason for your answer. Identify the variable from the equations with a variable.
(t − 7) > 5
Complete the entries in the third column of the table.
|
S.No. |
Equation |
Value of variable |
Equation satisfied Yes/No |
|
(a) |
10y = 80 |
y = 10 |
______ |
|
(b) |
10y = 80 |
y = 8 |
______ |
|
(c) |
10y = 80 |
y = 5 |
______ |
|
(d) |
4l = 20 |
l = 20 |
______ |
|
(e) |
4l = 20 |
l = 80 |
______ |
|
(f) |
4l = 20 |
l = 5 |
______ |
|
(g) |
b + 5 = 9 |
b = 5 |
______ |
|
(h) |
b + 5 = 9 |
b = 9 |
______ |
|
(i) |
b + 5 = 9 |
b = 4 |
______ |
|
(j) |
h − 8 = 5 |
h = 13 |
______ |
|
(k) |
h − 8 = 5 |
h = 8 |
______ |
|
(l) |
h − 8 = 5 |
h = 0 |
______ |
|
(m) |
p + 3 = 1 |
p = 3 |
______ |
|
(n) |
p + 3 = 1 |
p = 1 |
______ |
|
(o) |
p + 3 = 1 |
p = 0 |
______ |
|
(p) |
p + 3 = 1 |
p = − 1 |
______ |
|
(q) |
p + 3 = 1 |
p = − 2 |
______ |
Pick out the solution from the values given in the bracket next to each equation. Show that the other values do not satisfy the equation.
p − 5 = 5 (0, 10, 5, − 5)
