Answer: x + 30 + 90= 180(sum of angles on a straight line)
x= 180-120
x=60
Answer:
X > 9
Step-by-step explanation:
2x > 18
x > 18/2
x > 9
Answer:
x=3
y=-1
Step-by-step explanation:
first multiply the 2nd row by 2 so you will get
4x-4y=16
4x+2y=10
then subtract the 2nd row from the first row and so you will get
-6y=6
then solve for y in the above equation
y=-1
then substitute y=-1 into any 2 equations .
i picked the first 1
4x-4 × -1=16
then solve for x .
you will get
x=3
