a, 2x - 90 = 0
⇒ 2x = 90
⇒ x = 90 : 2
⇒ x = 45
Vậy S = {45}
b, 95 - 37 + 18 + 59 x 0
= 58 + 18 + 0
= 76
Đáp án:
Giải thích các bước giải:
a) `2x - 90 = 0`
`⇔ 2x = 90`
`⇔ x = 90 : 2`
`⇔ x = 45`
Vậy `S = {45}`
b) `95 - 37 + 18 + 59 × 0`
`= 58 + 18 + 0`
`= 76`
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