Question

F a = 5 and b = 6 , evaluate the following expression: 20 − 3 a + 2 b

Answer 1

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if a=5 and b=6, evaluate the following expression:-

20-3a+2b

`\rule{50}{1}\large\blue\textsf{\textbf{\underline{Answer and how to solve:-}}}\rule{50}{1}`

Given the expression:-

`\longmapsto\sf{20-3a+2b}`

To find:-

• The simplified expression

What to do:-

• Substitute 5 for a and 2 for b:-

`\longmapsto\sf{20-3(5)+2(6)}`

On simplification,

`\longmapsto\sf{20-15+12}`

On further simplification,

`\longmapsto\sf{5+12}`

Finally, We get:-

`\longmapsto\sf{17}`

Good luck with your studies.
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Answer 2

17

Explanation:

substitute the values for a and b into the expression

20 - 3a + 2b

= 20 - 3(5) + 2(6)

= 20 - 15 + 12

= 5 + 12

= 17