Answer:
x = 7
Step-by-step explanation:
40x ÷ 10 = 28
40x ÷ 10 × 10 = 28 × 10
40x = 280
40x ÷ 40 = 280 ÷ 40
x=7
40x/10 = 28
40x/10 * 10 = 28 *10
40x= 280
40x/40 = 280/40
