Question

Find the valu of 7x + 5y - 9z for
1. x = 1 , y= 3, Z = 4​

Answer 1

Answer:

x = 1, y = 3, z = 4

$7x + 5y - 9z$

$7(1) + 5(3) - 9(4)$

$7 + 15 - 36$

$22 - 36$

$-14$

Ans. -14

Hope it helps.

Answer 2

• We have to evaluate the above expression by using the given data.

            Given data:-$x=1,y=3,z=4.$

            To find:- Value of above expression $7x+5y-9z.$

            Solution:-

• To solve the above equation we will follow the BODMAS rule.

• BODMAS is an order of mathematic operations.

• BODMAS rule is to be followed while solving expressions in mathematics. It stands for,

          B= bracket

           O= order of power or rules

           D= division

           M= multiplication

           A= addition

           S= subtraction

   Now put the values x,y, and z in the given equation we get,

            $7x+5y-9z\\=>7(1)+5(3)-9(4)\\=>7+15-36\\=>22-36\\=>-14.$

    Hence we will get the value is $-14.$