Răspuns :
a) mₐ=198+202/2
mₐ=400/2
mₐ=200
b) a+b+c/3=45
a+b+c=45×3
a+b+c=135
c) a+2a/2=96
3a/2=96
3a=96×2
3a=192
a=192:3
a=64
a) ( 198 + 202 ) : 2 = 400 : 2 = 200
b) ( a + b + c ) : 3 = 45
a + b + c = 45 × 3
a + b + c = 135
c) ( a + 2a ) : 2 = 96
a + 2a = 96 × 2
a + 2a = 192
3a = 192
a = 192 : 3
a = 64