Question

60+а=80 100-d=20+10 90-c=50

Answer 1

60+a=80
a=80-60
a=20
60+20=80

100-d=20+10
100-d=30
d=100-30
d=70
100-70=20+10

90-c=50
c=90-50
c=40
90-40=50

Answer 2

60+a=80
a=80-60
a=20
-------------
60+20=80
80=80


100-d=20+10
d=100-20+10
d=70
----------------
100-70=20+10
30=30


90-c=50
c=90-50
c=40
------------
90-40=50
50=50

Answer 3

Let's solve each equation step by step:

1. 60 + a = 80 To isolate "a," we can subtract 60 from both sides of the equation: 60 + a - 60 = 80 - 60 a = 20

Therefore, the solution for "a" is 20.

2. 100 - d = 20 + 10 First, simplify the right side of the equation: 20 + 10 = 30

Then, subtract 30 from both sides of the equation: 100 - d - 30 = 30 - 30 100 - d = 0

To isolate "d," subtract 100 from both sides: 100 - d - 100 = 0 - 100 -d = -100

Multiplying both sides by -1 will give us the value of "d": d = 100

So, the solution for "d" is 100.

3. 90 - c = 50 To isolate "c," subtract 90 from both sides of the equation: 90 - c - 90 = 50 - 90 -c = -40

Multiplying both sides by -1 will give us the value of "c": c = 40

Thus, the solution for "c" is 40.

In summary, the solutions to the given equations are: a = 20 d = 100 c = 40