Question

{2la puterea 5+5x[3la puterea2-(3x-2)x2+5la puterea2]-2la puterea3x3la puterea2}x7+60=900

Answer 1

$[32+5*(9-6x+4+25)-8*9]*7=900-60$

$[32+5*(38-6x)-72]*7=840$

$32+190-30x-72= \frac{840}{7}$

$150-30x= 120$

$-30x=120-150$

$-30x=-30$ $|*(-1)$

$30x=30$

$x= \frac{30}{30}$

$x=1$