Answer:
x=3
Step-by-step explanation:
The answer should be 4 because it's like 8 - 4. You just subtract the number with the higher absolute value, which is 8 in this situation. Since the 4 is negative, you subtract.
X+y=70
x-y=30
x=30+y
30+y+y=70
2y=40
y=20
x+20=70
x=50
xy=(50)(20)=1000
Putting it like 7*t*s*3*r*t and multiplying like terms using the commutative property, we get 21*t²*s*r or 21rst²
