Answer:
Step-by-step explanation:
a+2a+a+10=180
4a=180-10
4a=170
a=42.4°
2a=42.5*2=85°
a+10=42.5+10=52.5°
Answer:
4 fluid ounces
Step-by-step explanation:
question is worded a little weird
Answer:
a
Step-by-step explanation:
2x +7= 19
2x= 19 -7 <em>(-7 on both sides)</em>
2x= 12 <em>(</em><em>simplify</em><em>)</em>
x= 12 ÷2
x= 6
You just need to divide 812 by 4 to find out how many minutes Monica practiced each week.
812÷4
For solving these equation, it is important to isolate the variable to then solve it.
In this first equation,
3(4+x)=x+6
12+3x=x+6
12+2x=6
2x=-6
x=-3
to prove this, just substitute x value back into equation;
3(4-3)=-3+6
3(1)=3
3=3
Same for the next equations;
1+2x-x=x-5+x
1+x=2x-5
1=x-5
6=x
Then substitute this value back into equation;
1+2(6)-6=6-5+6
1+12-6= 12-5
7=7