1. 3(5 − 2x) = −2(6 – 3x) − 10x
2. 1/4x - 2/5x = 39
3. 115 = 20 + 2.5x
4. 0.7x − 0.2 = 8.3x + 7.2

x = -260
x = -37/38
x = 38
x = 13.5

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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