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Question
Write the following statement as an equation:
5 subtracted from thrice a number is 16.
Solution
Let the required number be x.
So, thrice the number will be 3x.
∴ 3x − 5 = 16
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z + 12 > 24
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 |
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|
(k) |
h − 8 = 5 |
h = 8 |
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|
(l) |
h − 8 = 5 |
h = 0 |
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|
(m) |
p + 3 = 1 |
p = 3 |
______ |
|
(n) |
p + 3 = 1 |
p = 1 |
______ |
|
(o) |
p + 3 = 1 |
p = 0 |
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|
(p) |
p + 3 = 1 |
p = − 1 |
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|
(q) |
p + 3 = 1 |
p = − 2 |
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Complete the table and find the solution to the equation m − 7 = 3.
-
m
5
6
7
8
9
10
11
12
13
______
m − 7
______
______
______
______
______
______
______
______
______
______
