Answer: 1. 7, 2. 0, 3. 4, 4. 7, 14
Step-by-step explanation:
1. (3+4)+7=14 3+(4+x) x=7 14-3+4
2. 15+0=15 15-15=0
3. (4x12)x6=288 Yx(12x6) 12x6=72 288/72= 4
4. (2x7)x5=70 2x(Yx5) 2x5=10 70/10=7 Y=7
5. 14x35=490 490/35=14
