3x + 2x + 145 = 282
Combining like terms:5x + 145 = 282
Subtracting 145 from both sides:5x = 137
Dividing by 5:x = 27.4
Now we substitute x back into the second equation to evaluate the expression:
3 + 53 · 2.1
First, we calculate 53 multiplied by 2.1:53 * 2.1 = 111.3
Then we add 3 to this result:111.3 + 3 = 114.3
Therefore, the value of the expression is 114.3.
3x + 2x + 145 = 282
Combining like terms:
5x + 145 = 282
Subtracting 145 from both sides:
5x = 137
Dividing by 5:
x = 27.4
Now we substitute x back into the second equation to evaluate the expression:
3 + 53 · 2.1
First, we calculate 53 multiplied by 2.1:
53 * 2.1 = 111.3
Then we add 3 to this result:
111.3 + 3 = 114.3
Therefore, the value of the expression is 114.3.