Find the numbers from the questions given below.
1) If 15 is added to 10 times a number is 195
2) 30 subtracted from 6 times a number is 150.
3) Twice of 5 less than a number is 120.
4) 4 times 1 of a number is 80
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1. Let no be x.
10x + 15 = 195
10x = 195 -15
10x = 180
x = 180/10
x = 18
2. Let no be x.
6x - 30 = 150
6x = 150 - 30
6x = 120
x = 120/6
x = 20
3. Let no be x.
2(x-5) =120
2x - 10 = 120
2x = 120 + 10
2x = 130
x = 130/2
x = 65
4. Let no be x.
4 × 1/5x = 80
x = 80 × 5/4
x = 100
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