25% of x + 30% of 90 = 30% of 210. Then what is the value of x?

124 94 146 144

144

⇒ 25% of x + 30% of 90 = 30% of 210 ⇒ (25 × x) + (30 × 90) = (30 × 210) ⇒ 25x = (30 × 210) - (30 × 90) = 30 (210 - 90)  ⇒ 25x = 3600 ⇒ x = 144