Question

Check whether the x value of the expression (5x+4)+(7x+4)=56 is 4 or not

Answer 1

Answer:

$(5x + 4) + (7x + 4) = 56$

$5x +7x + 4 + 4 = 56$

(removing all brackets and arranging all variables and numbers )

Now,

12x+8=56

12x=56-8

12x=48

x=48/12

x=4

hence x=4 (proved).