tom is 20 years
Sam is 50 years
Step-by-step explanation:
- s+t= 70
- 4t=s
- putting value of s in step 2 from 1
- 4t=70-t
- 5t=70
- t=70/5
- t=20
- s=50
Answer = <span><span><span><span>12<span>x3</span></span>−<span>7<span>x2</span></span></span>+<span>9x</span></span>−<span>2</span></span>
Answers: (x, y, z) = (1, 2, -1)
Solving Steps: