5x²-(-2x²) = 7x²
(-3x)-(-x) = (-3x+x)=-2x
(-2)-(10)=-12
7x²-2x-12
The equation is 2x + 6 = -2x - 2
2x + 4 = -2x
4 = -x
x = -4
Answer:
The equation would be 7 x 13 + x
Answer:
it would be in a decimal 2.6
Step-by-step explanation:
Answer:Temperature of 10 degrees
Step-by-step explanation:
The others involve a decrease of 10 units, justifying use of a megative number.