19 = 15w-4(3w-1) > subtract 15w from both sides 19-15w = -4(3w-1) > work out the -4(3w-1) 19-15w = -12w+4 > subtract 19 from both sides -15w = -12w-15 > add 12w to both sides -3w = -15 > divide by -3 w = 5
hope this helped and I hope I get brainliest answer bud :)