Answer:
x=-5
Step-by-step explanation:
-4x+1=21
move the 1 to the right side and subract it so it will turn into -4x=20
divide -4 to get the x by itself and then you will get x=20/-4 this will now divide and be x=-5
The answer for this is x=-5
a.
b.
<em>A = 220 mm²</em>
<em>b = 20 mm</em>
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use division for the numbers.
