Answer:
<h2>50</h2>
Step-by-step explanation:
Put h = 7 to the expression 5 · (h + 3):

425 is decreased to 319.
The above statement means that a number should be deducted from 425 to get the difference of 319.
Let x be the unknown number.
425 - x = 319
425 - 319 = x
106 = x
106 is the unknown number.
It can be phrased like this: 425 decreased by 106 is 319.
M - 30 = 10
so the number has to be 10 more than 30.
30+ 10 = m
m = 40