20+x=40+60
\(\Rightarrow\)20+x=100
\(\Rightarrow\)x=100-20
\(\Rightarrow\)x=80
10+90=40+x
\(\Rightarrow\)100=x+40
\(\Rightarrow\)x=100-40
\(\Rightarrow\)x=60
20 + x = 40 + 60
=> 20 + x = 100
=> x = 100 - 20
=> x = 80
10 + 90 = 40 + x
=> 100 = 40 + x
=> x = 100 - 40
=> x = 60
a)20 + x = 40 + 60
20 + x =100
x = 100 - 20
x = 80
b)10 + 90 = 40 + x
40 + x =100
x = 100 - 40
x = 60
20 + x = 40 + 60
20 + x = 100
x = 100 - 20
x = 80
10 + 90 = 40 + x
100 = 40 + x
40 + x = 100
x = 100 - 40
x = 60
20+x=40+60
=>20+x=100
=>x=100-20
=>x=80
10+90=40+x
=>100=40+x
=>x=100-40
=>x=60
20 + x = 40 + 60 10 + 90 = 40 + x
20 + x = 100 100 = 40 + x
x = 100 - 20 x = 100 - 40
x = 80. x. =. 60
20 + X = 40 + 60
20 + X = 100
X = 100 - 20
X = 80
10 + 90 = 40 + X
100 = 40 + X
X = 100 - 40
X = 60
\(20+x=40+60\Rightarrow x=80\)
\(10+90=40+x\Rightarrow x=60\)