-79 = 7w + 3(4w – 1)
how do i solve this ?

-4 = w OR w = -4

Step-by-step explanation: For this given equation you will have to solve for the variable w. In order to do this you must isolate the variable w.

Step 1: Use the distributive property: -79=7w+3(4w-1)  ( 3 x 4w = 12w and 3 x -1 = -3.

Step 2: Add like terms and whole numbers: -79=7w+12w-3 (  7w + 12w = 19w

Step 3: Use the Addition Property of Equality:3 + -79=19w-3+3 ( 3 + -79 = -76 and -3 + 3 =0

Step 4: Use the division Property of Equality: -76=19w -76 divided by 19 is -4 and 19w divided by 19 is w

Step 5: The -4=w

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this