Bjr
a) 2a = 15
2a ÷ = 15 ÷ 2
a = 7,5
b) -3y = 21
-3y ÷ (-3) = 21 ÷ (-3)
y = -7
c) 31 + x = 0
31 - 31 + x = 0 - 31
x = -31
d) g - 43 = -12
g - 43 + 43 = -12 + 43
g = 31
e) p + 4 = -1,5
p + 4 - 4 = -1,5 - 4
p = -5,5
f) 2x - 4 = -10
2x - 4 + 4 = -10 + 4
2x = -6
2x ÷ 2 = -6 ÷ 2
x = -3
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Bjr
a) 2a = 15
2a ÷ = 15 ÷ 2
a = 7,5
b) -3y = 21
-3y ÷ (-3) = 21 ÷ (-3)
y = -7
c) 31 + x = 0
31 - 31 + x = 0 - 31
x = -31
d) g - 43 = -12
g - 43 + 43 = -12 + 43
g = 31
e) p + 4 = -1,5
p + 4 - 4 = -1,5 - 4
p = -5,5
f) 2x - 4 = -10
2x - 4 + 4 = -10 + 4
2x = -6
2x ÷ 2 = -6 ÷ 2
x = -3