Change the subtraction to add 2x plus -4x
5=-4x (+2x)-7
5=-2x-7
since the x's are now on one side and we can't do anything with 5, on the other side you change -7 to add to the other side.
5 (+7)= -2x
12= -2x
divide -2 by 12.
-6 = x
I think the answer might be 6
-3(4r - 8) = -36
Mutiply the bracket by -3
(-3)(4r)(-3)(-8)= -12r+24
-12r+24= -36
move +24 to the other side
sign changes from +24 to -24
-12r+24-24= -36-24
-12r= -60
divide by -12
-12r/-12= -60/-12
r= 5
Answer: r= 5
254 is the answer 2,540• 10 gives ur answer to 254
