Answer:
-52.5 or -53
Step-by-step explanation:
Start by subtracting 18 from both sides. With you get 0.4=-21. Now divide 0.4 into both sides.
x=-77.5
since we're looking for x,18 must cross the equal sign to become negative.
0.4x=-13-18
0.4x=-31
dividing both side by 0.4,
we have x=-31÷0.4
therefore x= -77.5
-x -7y=-15
y=3x-1
-x-7(3x-1)=-15
-x-21x+7=-15
-22x+7=-15
-22x=-15-7
-22x=-22
x=-22/-22
x=1
y=3(1)-1
y=3-1
y=2
(1, 2)
-3
its the middle number so you put them in order and get the ndeswer just whatevers in the midde
-9 -6 -3 -2 8
-216x^9 y^18 is a perfect cube
