Question

a) x+(-7)=-8; b) x-(-5)=10; c) -2x=-22 d) +3x=-48; e) -2x+4=-10; f) -3x-(-3)=-9; g) 2x-(-4)=-2 la puterea 4 ; h) 3x-(-18)=(-3) la puterea 4.

Answer 1

a) x - 7 = -8 <=> x = -1
b) x + 5 = 10 <=> x = 5
c) -2x = -22 <=> x = 11
d) 3x = -48 <=> x = -16
e) -2x + 4 = -10 <=> -2x = -14 <=> x = 7
f) -3x + 3 = -9 <=> -3x = -12 <=> x = 4
g) 2x + 4 = -2⁴ <=> 2x + 4 = -16 <=> 2x = - 20<=> x = - 10
h) 3x + 18 = ( - 3 )⁴ <=> 3x + 18 = 81 <=> 3x = 63 <=> x = 21.

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