Question

(ii) 7 + 5x-3x = 21​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Concept: This is a simple linear equation example. To solve this question we will find out the value of 'x'. To solve a linear equation we write like terms together and then find the value of a variable.

Given: An equation $7+5x-3x=21$

To find: the value of 'x'

Solution:

$7+5x-3x=21$

Write the like terms together

⇒ $5x-3x= 21-7$

⇒ $2x= 14$

⇒ $x=7$

Hence the answer of the question is x=7