Question

3*[48,5-3*(x-9,6*7,4)]-90,21=9,3

Answer 1

3*[48,5-3*(x-9,6*7,4)]-90,21=9,3
3*[48,5-3*(x-71,04)] = 9,3+90,21
3*[48,5-3*(x-71,04)] = 99,51
48,5-3*(x-71,04) = 99,51:3
48,5-3*(x-71,04) = 33,17
3*(x-71,04) = 48,5-33,17
3*(x-71,04) = 15,33
X-71,04 = 15,33:3
X-71,04 = 5,11
X = 5,11+71,04
X = 76,15