Question

Evaluate 4x - 3y when X=2 and y = -1

Answer 1

4x-3y= 2

4(2)-3(-1)

Whenever multiplying negative sign and negative sign= positive sign

8+3

= 11

Answer 2

   Value of the expression will be 11.

Evaluation of the expression by substitution method,

• In substitution method, substitute the values of the variables in the given expression and further solve it.

Given expression in the question,

(4x - 3y)

Substitute the values of variables x = 2 and y = -1 in the expression then simplify,

(4x - 3y) = 4(2) - 3(-1)

             = 8 + 3

             = 11

     Hence, value of the given expression will be 11,

Learn more about the substitution method,

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