Răspuns:
4×j+124=(24:3+45:5)+143
4×j+124=(8+9)+143
4×j+124=17+143
4×j+124=160
4×j=160-124
4×j=36
j=36:4
j=9
Sper ca te am ajutat
1. 128-j = (8+9)+143 => -j= 143+ 17 -128
-j= 160-128 => j=-32
2. m:7 + (369 - 212)= 164
m:7 + 157=164 => m:7=7 => m= 7x7=49
3. a-b=36
a=4b => a= 4x12= 48 ani
=> 4b-b=36
3b=36 => b=12 ani
