15 more than x is 58

58-15=43

x=43

if you want an equation:

x+15=58

The equation for this would be x + 15 = 58.

Step-by-step explanation:

"More than" would refer to addition. So 15 more than x would be x + 15.

"Is" means "equals", so when they say "is 58" it means "equals 58."

Put it all together: x + 15 = 58.