400-3x=112
3x=400-112=288
x=96
He is 96 years old.
Answer:
x=25
x=47
y=25 x=10
y=20
Step-by-step explanation:
2x+10=60
-10 -10
2x=50
2x/2=50/2
x=25
2x+6=100
-6 -6
2x=94
2x/2=94/2
x=47
5y-25=100
+25 +25
5y=125
5y/5=125/5
y=25
11x-30+100=180
11x+70=180
-70 -70
11x=110
11x/11=110/11
x=10
7y-10=3y+70
+10 +10
7y=3y+80
-3y-3y
4y=80
4y/4=80/4
y=20
hopefully this helps :)
Solving the expression
we get -29
Step-by-step explanation:
We need to simplify 
Solving:

Using DMAS rule




So, solving the expression
we get -29
Keywords: Solving the expression
Learn more about Solving the expression at:
#learnwithBrainly
The algebraic expression 3y would be represented verbally by 3 multiplied by y!